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Re: [sohohunter] first measurements of the new Marsden comet

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  • Rainer Kracht
    Hi all, I have made these measurements to find out if they line up with those of C/2000 C4 and C/2005 W1. They do! Here is my solution with Exorb: 2000/ 2/ 5
    Message 1 of 8 , Jul 19, 2011
      Hi all,

      I have made these measurements to find out if
      they line up with those of C/2000 C4 and C/2005 W1.

      They do!

      Here is my solution with Exorb:

      2000/ 2/ 5 JD=2451579.6633321 (ref. J2000.0) File: 0C45W111.POS
      Equat. Pos. & Vel. Ecliptic Oscul. Elements
      (Gm, km/s) (deg, AU)
      Itr: 3 Converged sw= 3.9276E-03°
      e : 0.98523409 s= 3.1E-07 X0 : -1.36030723E+00 s= 1.9E-04
      i : 25.04239088 s= 7.5E-04 Y0 : 5.88954295E+00 s= 9.9E-05
      w : 22.76945588 s= 1.8E-03 Z0 : 3.80444939E+00 s= 1.0E-04
      Nod: 80.73058663 s= 1.4E-03 Vx0: -1.70477579E+02 s= 1.7E-03
      a : 3.23325159 s= 7.9E-07 Vy0: -7.27811118E+01 s= 2.2E-03
      M0: 359.99941813 s= 3.3E-06 Vz0: 5.02876030E+01 s= 2.3E-03
      Rj0: -2.75887E-08 DataPoints: 121 Time Span: 4180.750 d
      A1: 9.44827685E-10 M. Motion: 0.1695293215 s= 6.2E-08
      A2: -4.53255273E-09 Perih Dist : 0.04774189 s= 9.8E-07
      A3: 0.00000000E+00 Perih Long : 103.50004251 s=-3.0E-04
      AF: 1.11000000E-01 Period (JY): 5.81390 s= 2.1E-06
      Perih Time : 0.00343 s= 7.6E-04

      Minimum earth distance will be 2011 July 31 with 0.84 au (r = 0.557 au)
      The comet will then be in Leo moving with 7"/min in RA and 3"/min in Decl,
      elongation from sun ~34 deg, I think this is a bit too difficult.

      Orbital Elements for epoch 2455800.5 (2011 Aug 27) with A1 = +0.0945, A2 = -0.4533

      Ecliptic Osculating Elements (J2000.0) at JD 2455800.500000 Date: 2011/08/27:00:00:00.00
      Body e i w Node q JD-Tp
      2000C4 0.985493941 23.2324167 24.3093368 78.8033779 0.045753040 39.8211541

      Regards, Rainer


      Residuals:
      No Time d|r| (Gm) dRho (Gm) dRA*(") dDec (") dAng (")

      4 20000205.163332 2.939E-03 0.000E+00 -0.415 4.031 4.052
      5 20000205.167482 2.547E-03 -2.842E-14 -1.966 -2.910 3.512
      6 20000205.171642 3.300E-03 -2.842E-14 -1.614 4.254 4.550
      7 20000205.175112 1.140E-03 -2.842E-14 -1.535 -0.342 1.573
      8 20000205.184142 1.085E-03 -2.842E-14 1.432 -0.436 1.497
      9 20000205.188312 3.953E-03 -2.842E-14 -2.748 -4.707 5.451
      10 20000205.192472 2.418E-03 -2.842E-14 1.837 -2.783 3.334
      11 20000205.225802 1.790E-03 0.000E+00 -2.468 0.003 2.468
      12 20000205.229972 2.832E-03 -5.684E-14 -2.816 -2.705 3.905
      13 20000205.234142 9.097E-04 0.000E+00 -0.058 -1.253 1.254
      14 20000205.242472 2.885E-03 -2.842E-14 -2.794 -2.832 3.978
      15 20000205.246642 2.177E-03 -2.842E-14 -2.324 -1.901 3.002
      16 20000205.250812 2.367E-03 0.000E+00 -1.661 -2.810 3.264
      17 20000205.254972 2.547E-03 -2.842E-14 -2.447 -2.519 3.512
      18 20000205.258442 1.813E-03 0.000E+00 -0.005 -2.500 2.500
      19 20000205.267472 1.885E-03 -2.842E-14 -1.914 -1.759 2.599
      20 20000205.271642 2.458E-03 0.000E+00 -1.815 -2.862 3.389
      21 20000205.275822 4.061E-03 -2.842E-14 -2.815 -4.841 5.600
      22 20000205.284152 3.078E-03 -2.842E-14 -0.568 -4.206 4.244
      23 20000205.288312 4.605E-03 -2.842E-14 -2.937 -5.630 6.350
      24 20000205.292472 2.775E-03 0.000E+00 -3.720 -0.893 3.826
      25 20000205.296642 2.385E-03 0.000E+00 -1.279 -3.030 3.289
      26 20000205.300122 2.956E-03 -5.684E-14 -1.702 -3.703 4.075
      27 20000205.421642 2.418E-03 0.000E+00 2.170 -2.531 3.334
      28 20000205.427272 3.178E-03 0.000E+00 1.540 -4.102 4.382
      29 20000205.434272 2.318E-03 -2.842E-14 2.891 -1.363 3.196
      30 20000205.438312 1.672E-03 0.000E+00 -1.169 -1.987 2.305
      31 20000205.442482 4.259E-03 0.000E+00 4.522 -3.746 5.873
      32 20000205.450812 3.217E-03 0.000E+00 4.042 -1.826 4.435
      33 20000205.454972 9.700E-04 -2.842E-14 -0.690 -1.146 1.337
      34 20000205.459142 2.515E-03 -2.842E-14 -0.913 -3.346 3.468
      35 20000205.463312 3.938E-03 0.000E+00 3.168 -4.409 5.429
      36 20000205.466782 2.766E-03 -2.842E-14 2.333 -3.016 3.814
      37 20000205.475802 2.001E-03 -2.842E-14 0.272 -2.746 2.759
      38 20000205.480002 1.847E-03 -2.842E-14 -1.051 -2.320 2.547
      39 20000205.484142 3.749E-03 -2.842E-14 3.655 -3.655 5.169
      40 20000205.492492 3.513E-03 -2.842E-14 2.652 -4.054 4.844
      41 20000205.496642 3.910E-03 -2.842E-14 4.470 -3.014 5.392
      42 20000205.500802 3.847E-03 -2.842E-14 4.966 -1.861 5.304
      43 20000205.504982 2.175E-03 -2.842E-14 -1.469 -2.615 2.999
      44 20000205.508462 3.936E-03 0.000E+00 1.743 -5.139 5.427
      45 20000205.517472 3.721E-03 -2.842E-14 0.997 -5.033 5.131
      46 20000205.521652 2.381E-03 2.842E-14 0.049 -3.282 3.282
      47 20000205.525812 2.689E-03 -2.842E-14 1.530 -3.377 3.708
      48 20000205.621642 3.653E-03 0.000E+00 -0.029 -5.036 5.036
      49 20000205.625802 5.489E-03 0.000E+00 -1.204 -7.472 7.568
      50 20000205.629982 1.418E-03 -2.842E-14 -0.693 -1.828 1.955
      51 20000205.633442 4.062E-03 0.000E+00 0.890 -5.530 5.601
      52 20000205.642482 3.696E-03 0.000E+00 5.089 -0.276 5.097
      53 20000205.646642 4.886E-03 -2.842E-14 -2.561 -6.230 6.736
      54 20000205.650812 3.631E-03 -2.842E-14 2.878 -4.096 5.006
      55 20000205.659142 5.281E-03 -2.842E-14 -5.688 -4.546 7.281
      56 20000205.663312 3.446E-03 0.000E+00 -3.570 -3.135 4.751
      57 20000205.667602 3.168E-03 -2.842E-14 -2.312 -3.706 4.368
      58 20051116.579974 8.353E-03 -2.842E-14 -10.192 5.363 11.517
      59 20051116.588304 5.164E-03 -2.842E-14 5.177 4.889 7.120
      60 20051116.629974 1.359E-03 -5.684E-14 -1.534 1.076 1.874
      61 20051116.646644 1.123E-03 -2.842E-14 -1.455 0.529 1.548
      62 20051116.663474 9.668E-03 -2.842E-14 -11.746 -6.303 13.330
      63 20051116.671644 2.586E-03 -2.842E-14 -1.449 -3.257 3.565
      64 20051116.688584 3.326E-03 0.000E+00 -4.355 -1.436 4.586
      65 20051116.705244 7.739E-03 2.842E-14 -4.836 -9.511 10.670
      66 20051116.713304 2.129E-02 2.842E-14 -28.034 -8.696 29.352
      67 20051116.729974 9.577E-03 0.000E+00 -11.345 -6.756 13.205
      68 20051116.746644 1.678E-02 -5.684E-14 -11.571 -20.033 23.135
      69 20051116.754984 7.706E-03 0.000E+00 -10.242 2.824 10.625
      70 20051116.771644 1.158E-02 -2.842E-14 -9.361 12.927 15.961
      71 20051116.788304 7.999E-04 0.000E+00 -0.258 -1.072 1.103
      72 20051116.814454 8.086E-03 0.000E+00 6.290 9.205 11.148
      73 20051116.829974 1.547E-02 0.000E+00 4.739 -20.801 21.334
      74 20051116.838304 9.824E-03 -2.842E-14 4.982 12.597 13.546
      75 20051116.979984 9.116E-03 -2.842E-14 -3.081 -12.185 12.569
      76 20051116.996644 6.770E-03 -2.842E-14 5.672 -7.413 9.335
      77 20051117.004974 8.377E-03 0.000E+00 9.892 -5.964 11.551
      78 20051117.038594 2.308E-02 -2.842E-14 18.048 -26.209 31.822
      79 20051117.079974 4.613E-03 -2.842E-14 6.361 0.062 6.361
      80 20051117.088304 1.410E-02 0.000E+00 16.087 -10.912 19.438
      81 20051117.104974 1.532E-02 -2.842E-14 0.310 -21.127 21.130
      82 20051117.121644 2.040E-02 -2.842E-14 10.636 -26.045 28.133
      83 20051117.129974 1.713E-02 -2.842E-14 10.018 -21.394 23.624
      84 20051117.146644 1.556E-02 0.000E+00 21.454 -0.009 21.454
      85 20051117.163514 2.429E-03 -2.842E-14 2.022 2.670 3.350
      86 20051117.171644 1.131E-02 0.000E+00 12.713 9.021 15.589
      87 20051117.321644 2.320E-02 -2.842E-14 5.568 31.498 31.986
      88 20051117.346644 2.156E-02 -5.684E-14 -16.700 24.598 29.732
      89 20051117.363304 1.069E-02 0.000E+00 4.814 -13.938 14.746
      90 20051117.388304 2.102E-02 0.000E+00 -28.271 6.387 28.983
      91 20051117.405244 8.250E-03 -2.842E-14 -3.210 10.913 11.375
      92 20051117.431624 3.289E-02 0.000E+00 45.332 -1.458 45.355
      93 20051117.446644 1.533E-02 0.000E+00 6.427 20.142 21.142
      94 20051117.471644 6.419E-03 0.000E+00 -6.599 5.897 8.850
      95 20051117.488304 7.821E-03 -2.842E-14 -4.823 9.645 10.784
      96 20051117.513314 5.715E-03 0.000E+00 -6.185 4.883 7.880
      97 20051117.529984 2.013E-02 -2.842E-14 -18.262 20.902 27.755
      98 20051117.571644 1.004E-02 0.000E+00 13.529 2.921 13.841
      99 20051117.596654 1.268E-02 0.000E+00 -17.274 2.652 17.477
      100 20051117.613324 2.171E-02 -2.842E-14 15.316 25.726 29.940
      101 20051117.638304 6.690E-03 -2.842E-14 1.022 9.167 9.224
      102 20051117.655244 2.658E-02 -2.842E-14 -19.447 31.069 36.653
      103 20051117.679974 9.147E-03 0.000E+00 -4.317 11.849 12.611
      104 20051117.696644 1.981E-02 2.842E-14 -12.342 24.365 27.313
      105 20110717.630120 1.885E-02 -5.684E-14 10.688 23.686 25.986
      106 20110717.638470 1.002E-02 -2.842E-14 1.188 13.766 13.817
      107 20110717.646790 6.403E-03 -5.684E-14 6.205 6.279 8.828
      108 20110717.655120 2.085E-02 -2.842E-14 -27.652 -7.878 28.752
      109 20110717.663470 1.207E-02 -5.684E-14 -13.185 -10.149 16.639
      110 20110717.713470 9.044E-03 -5.684E-14 2.897 -12.128 12.469
      111 20110717.721800 6.671E-03 2.842E-14 -8.339 3.883 9.198
      112 20110717.730120 1.038E-02 -2.842E-14 -3.962 13.755 14.314
      113 20110717.738450 1.531E-02 -2.842E-14 2.199 20.993 21.108
      114 20110717.746790 7.418E-03 -5.684E-14 1.597 10.102 10.228
      115 20110717.796800 1.148E-03 -2.842E-14 1.018 -1.212 1.583
      116 20110717.805120 8.890E-03 -5.684E-14 0.833 -12.229 12.257
      117 20110717.813450 4.412E-03 -2.842E-14 5.721 2.067 6.083
      118 20110717.821790 1.121E-02 -5.684E-14 1.553 15.380 15.458
      119 20110717.830120 7.445E-03 -2.842E-14 1.739 10.116 10.265
      120 20110717.883750 1.664E-02 -2.842E-14 1.134 22.918 22.946
      121 20110717.888450 3.476E-03 -2.842E-14 2.271 -4.221 4.793
      122 20110717.896800 2.793E-03 -2.842E-14 -3.851 -0.049 3.852
      123 20110717.905120 1.155E-02 -8.527E-14 13.263 8.805 15.920
      124 20110717.913450 2.184E-02 0.000E+00 -30.106 -0.041 30.106
      RMS -------------- 1.025E-02 2.889E-14 9.478 10.492 14.139



      On 19 Jul 2011, at 0:00, Rainer Kracht wrote:

      > Hi,
      >
      > from C3 images 2011 July 17 15:06 - 21:34 UTC:
      >
      > SOHO2115 S2011 07 17.62934 07 31 35.95 +20 57 09.0 7.51R 249
      > SOHO2115 s2011 07 17.62934 2 -0.00481836 +0.00970847 +0.00328107 249
      > SOHO2115 S2011 07 17.63769 07 31 46.02 +20 57 41.2 7.21R 249
      > SOHO2115 s2011 07 17.63769 2 -0.00481861 +0.00970839 +0.00328102 249
      > SOHO2115 S2011 07 17.64601 07 31 57.15 +20 58 15.7 7.18R 249
      > SOHO2115 s2011 07 17.64601 2 -0.00481885 +0.00970831 +0.00328098 249
      > SOHO2115 S2011 07 17.65434 07 32 05.58 +20 58 43.6 6.90R 249
      > SOHO2115 s2011 07 17.65434 2 -0.00481910 +0.00970822 +0.00328093 249
      > SOHO2115 S2011 07 17.66269 07 32 17.55 +20 59 23.5 7.05R 249
      > SOHO2115 s2011 07 17.66269 2 -0.00481935 +0.00970814 +0.00328089 249
      > SOHO2115 S2011 07 17.71269 07 33 25.56 +21 03 34.2 6.87R 249
      > SOHO2115 s2011 07 17.71269 2 -0.00482083 +0.00970765 +0.00328063 249
      > SOHO2115 S2011 07 17.72102 07 33 36.13 +21 04 32.3 6.72R 249
      > SOHO2115 s2011 07 17.72102 2 -0.00482108 +0.00970757 +0.00328059 249
      > SOHO2115 S2011 07 17.72934 07 33 47.87 +21 05 24.2 6.90R 249
      > SOHO2115 s2011 07 17.72934 2 -0.00482132 +0.00970749 +0.00328054 249
      > SOHO2115 S2011 07 17.73767 07 33 59.82 +21 06 13.5 6.42R 249
      > SOHO2115 s2011 07 17.73767 2 -0.00482157 +0.00970741 +0.00328050 249
      > SOHO2115 S2011 07 17.74601 07 34 11.37 +21 06 44.7 6.63R 249
      > SOHO2115 s2011 07 17.74601 2 -0.00482182 +0.00970732 +0.00328046 249
      > SOHO2115 S2011 07 17.79602 07 35 22.33 +21 10 45.1 6.65R 249
      > SOHO2115 s2011 07 17.79602 2 -0.00482331 +0.00970683 +0.00328020 249
      > SOHO2115 S2011 07 17.80434 07 35 34.38 +21 11 15.8 6.53R 249
      > SOHO2115 s2011 07 17.80434 2 -0.00482356 +0.00970675 +0.00328015 249
      > SOHO2115 S2011 07 17.81267 07 35 46.88 +21 12 11.8 6.62R 249
      > SOHO2115 s2011 07 17.81267 2 -0.00482380 +0.00970667 +0.00328011 249
      > SOHO2115 S2011 07 17.82101 07 35 58.82 +21 13 06.8 6.61R 249
      > SOHO2115 s2011 07 17.82101 2 -0.00482405 +0.00970659 +0.00328007 249
      > SOHO2115 S2011 07 17.82934 07 36 11.13 +21 13 43.1 6.50R 249
      > SOHO2115 s2011 07 17.82934 2 -0.00482430 +0.00970651 +0.00328003 249
      > SOHO2115 S2011 07 17.88297 07 37 32.02 +21 18 21.3 6.34R 249
      > SOHO2115 s2011 07 17.88297 2 -0.00482590 +0.00970598 +0.00327975 249
      > SOHO2115 S2011 07 17.88767 07 37 39.34 +21 18 17.2 6.27R 249
      > SOHO2115 s2011 07 17.88767 2 -0.00482604 +0.00970593 +0.00327973 249
      > SOHO2115 S2011 07 17.89602 07 37 51.82 +21 19 02.2 6.35R 249
      > SOHO2115 s2011 07 17.89602 2 -0.00482629 +0.00970585 +0.00327969 249
      > SOHO2115 S2011 07 17.90434 07 38 05.99 +21 19 51.6 6.20R 249
      > SOHO2115 s2011 07 17.90434 2 -0.00482654 +0.00970577 +0.00327964 249
      > SOHO2115 S2011 07 17.91267 07 38 15.92 +21 20 23.2 6.20R 249
      > SOHO2115 s2011 07 17.91267 2 -0.00482679 +0.00970569 +0.00327960 249
      >
      > Rainer
      >
      >
      > ------------------------------------
      >
      > Yahoo! Groups Links
      >
      >
      >
    • Sebastian F. Hoenig
      Hi Rainer, this looks indeed like a good match. Let s no no other Marsden-group comet shows up in the next couple of weeks which would mess up things... :) I
      Message 2 of 8 , Jul 19, 2011
        Hi Rainer,

        this looks indeed like a good match. Let's no no other Marsden-group comet shows up in the next couple of weeks which would mess up things... :)

        I note that you used non-grav parameters. Can you also reproduce the result without them?

        Cheers,
        Sebastian

        On Jul 19, 2011, at 12:17 PM, Rainer Kracht wrote:

        > Hi all,
        >
        > I have made these measurements to find out if
        > they line up with those of C/2000 C4 and C/2005 W1.
        >
        > They do!
        >
        > Here is my solution with Exorb:
        >
        > 2000/ 2/ 5 JD=2451579.6633321 (ref. J2000.0) File: 0C45W111.POS
        > Equat. Pos. & Vel. Ecliptic Oscul. Elements
        > (Gm, km/s) (deg, AU)
        > Itr: 3 Converged sw= 3.9276E-03°
        > e : 0.98523409 s= 3.1E-07 X0 : -1.36030723E+00 s= 1.9E-04
        > i : 25.04239088 s= 7.5E-04 Y0 : 5.88954295E+00 s= 9.9E-05
        > w : 22.76945588 s= 1.8E-03 Z0 : 3.80444939E+00 s= 1.0E-04
        > Nod: 80.73058663 s= 1.4E-03 Vx0: -1.70477579E+02 s= 1.7E-03
        > a : 3.23325159 s= 7.9E-07 Vy0: -7.27811118E+01 s= 2.2E-03
        > M0: 359.99941813 s= 3.3E-06 Vz0: 5.02876030E+01 s= 2.3E-03
        > Rj0: -2.75887E-08 DataPoints: 121 Time Span: 4180.750 d
        > A1: 9.44827685E-10 M. Motion: 0.1695293215 s= 6.2E-08
        > A2: -4.53255273E-09 Perih Dist : 0.04774189 s= 9.8E-07
        > A3: 0.00000000E+00 Perih Long : 103.50004251 s=-3.0E-04
        > AF: 1.11000000E-01 Period (JY): 5.81390 s= 2.1E-06
        > Perih Time : 0.00343 s= 7.6E-04
        >
        > Minimum earth distance will be 2011 July 31 with 0.84 au (r = 0.557 au)
        > The comet will then be in Leo moving with 7"/min in RA and 3"/min in Decl,
        > elongation from sun ~34 deg, I think this is a bit too difficult.
        >
        > Orbital Elements for epoch 2455800.5 (2011 Aug 27) with A1 = +0.0945, A2 = -0.4533
        >
        > Ecliptic Osculating Elements (J2000.0) at JD 2455800.500000 Date: 2011/08/27:00:00:00.00
        > Body e i w Node q JD-Tp
        > 2000C4 0.985493941 23.2324167 24.3093368 78.8033779 0.045753040 39.8211541
        >
        > Regards, Rainer
        >
        > Residuals:
        > No Time d|r| (Gm) dRho (Gm) dRA*(") dDec (") dAng (")
        >
        > 4 20000205.163332 2.939E-03 0.000E+00 -0.415 4.031 4.052
        > 5 20000205.167482 2.547E-03 -2.842E-14 -1.966 -2.910 3.512
        > 6 20000205.171642 3.300E-03 -2.842E-14 -1.614 4.254 4.550
        > 7 20000205.175112 1.140E-03 -2.842E-14 -1.535 -0.342 1.573
        > 8 20000205.184142 1.085E-03 -2.842E-14 1.432 -0.436 1.497
        > 9 20000205.188312 3.953E-03 -2.842E-14 -2.748 -4.707 5.451
        > 10 20000205.192472 2.418E-03 -2.842E-14 1.837 -2.783 3.334
        > 11 20000205.225802 1.790E-03 0.000E+00 -2.468 0.003 2.468
        > 12 20000205.229972 2.832E-03 -5.684E-14 -2.816 -2.705 3.905
        > 13 20000205.234142 9.097E-04 0.000E+00 -0.058 -1.253 1.254
        > 14 20000205.242472 2.885E-03 -2.842E-14 -2.794 -2.832 3.978
        > 15 20000205.246642 2.177E-03 -2.842E-14 -2.324 -1.901 3.002
        > 16 20000205.250812 2.367E-03 0.000E+00 -1.661 -2.810 3.264
        > 17 20000205.254972 2.547E-03 -2.842E-14 -2.447 -2.519 3.512
        > 18 20000205.258442 1.813E-03 0.000E+00 -0.005 -2.500 2.500
        > 19 20000205.267472 1.885E-03 -2.842E-14 -1.914 -1.759 2.599
        > 20 20000205.271642 2.458E-03 0.000E+00 -1.815 -2.862 3.389
        > 21 20000205.275822 4.061E-03 -2.842E-14 -2.815 -4.841 5.600
        > 22 20000205.284152 3.078E-03 -2.842E-14 -0.568 -4.206 4.244
        > 23 20000205.288312 4.605E-03 -2.842E-14 -2.937 -5.630 6.350
        > 24 20000205.292472 2.775E-03 0.000E+00 -3.720 -0.893 3.826
        > 25 20000205.296642 2.385E-03 0.000E+00 -1.279 -3.030 3.289
        > 26 20000205.300122 2.956E-03 -5.684E-14 -1.702 -3.703 4.075
        > 27 20000205.421642 2.418E-03 0.000E+00 2.170 -2.531 3.334
        > 28 20000205.427272 3.178E-03 0.000E+00 1.540 -4.102 4.382
        > 29 20000205.434272 2.318E-03 -2.842E-14 2.891 -1.363 3.196
        > 30 20000205.438312 1.672E-03 0.000E+00 -1.169 -1.987 2.305
        > 31 20000205.442482 4.259E-03 0.000E+00 4.522 -3.746 5.873
        > 32 20000205.450812 3.217E-03 0.000E+00 4.042 -1.826 4.435
        > 33 20000205.454972 9.700E-04 -2.842E-14 -0.690 -1.146 1.337
        > 34 20000205.459142 2.515E-03 -2.842E-14 -0.913 -3.346 3.468
        > 35 20000205.463312 3.938E-03 0.000E+00 3.168 -4.409 5.429
        > 36 20000205.466782 2.766E-03 -2.842E-14 2.333 -3.016 3.814
        > 37 20000205.475802 2.001E-03 -2.842E-14 0.272 -2.746 2.759
        > 38 20000205.480002 1.847E-03 -2.842E-14 -1.051 -2.320 2.547
        > 39 20000205.484142 3.749E-03 -2.842E-14 3.655 -3.655 5.169
        > 40 20000205.492492 3.513E-03 -2.842E-14 2.652 -4.054 4.844
        > 41 20000205.496642 3.910E-03 -2.842E-14 4.470 -3.014 5.392
        > 42 20000205.500802 3.847E-03 -2.842E-14 4.966 -1.861 5.304
        > 43 20000205.504982 2.175E-03 -2.842E-14 -1.469 -2.615 2.999
        > 44 20000205.508462 3.936E-03 0.000E+00 1.743 -5.139 5.427
        > 45 20000205.517472 3.721E-03 -2.842E-14 0.997 -5.033 5.131
        > 46 20000205.521652 2.381E-03 2.842E-14 0.049 -3.282 3.282
        > 47 20000205.525812 2.689E-03 -2.842E-14 1.530 -3.377 3.708
        > 48 20000205.621642 3.653E-03 0.000E+00 -0.029 -5.036 5.036
        > 49 20000205.625802 5.489E-03 0.000E+00 -1.204 -7.472 7.568
        > 50 20000205.629982 1.418E-03 -2.842E-14 -0.693 -1.828 1.955
        > 51 20000205.633442 4.062E-03 0.000E+00 0.890 -5.530 5.601
        > 52 20000205.642482 3.696E-03 0.000E+00 5.089 -0.276 5.097
        > 53 20000205.646642 4.886E-03 -2.842E-14 -2.561 -6.230 6.736
        > 54 20000205.650812 3.631E-03 -2.842E-14 2.878 -4.096 5.006
        > 55 20000205.659142 5.281E-03 -2.842E-14 -5.688 -4.546 7.281
        > 56 20000205.663312 3.446E-03 0.000E+00 -3.570 -3.135 4.751
        > 57 20000205.667602 3.168E-03 -2.842E-14 -2.312 -3.706 4.368
        > 58 20051116.579974 8.353E-03 -2.842E-14 -10.192 5.363 11.517
        > 59 20051116.588304 5.164E-03 -2.842E-14 5.177 4.889 7.120
        > 60 20051116.629974 1.359E-03 -5.684E-14 -1.534 1.076 1.874
        > 61 20051116.646644 1.123E-03 -2.842E-14 -1.455 0.529 1.548
        > 62 20051116.663474 9.668E-03 -2.842E-14 -11.746 -6.303 13.330
        > 63 20051116.671644 2.586E-03 -2.842E-14 -1.449 -3.257 3.565
        > 64 20051116.688584 3.326E-03 0.000E+00 -4.355 -1.436 4.586
        > 65 20051116.705244 7.739E-03 2.842E-14 -4.836 -9.511 10.670
        > 66 20051116.713304 2.129E-02 2.842E-14 -28.034 -8.696 29.352
        > 67 20051116.729974 9.577E-03 0.000E+00 -11.345 -6.756 13.205
        > 68 20051116.746644 1.678E-02 -5.684E-14 -11.571 -20.033 23.135
        > 69 20051116.754984 7.706E-03 0.000E+00 -10.242 2.824 10.625
        > 70 20051116.771644 1.158E-02 -2.842E-14 -9.361 12.927 15.961
        > 71 20051116.788304 7.999E-04 0.000E+00 -0.258 -1.072 1.103
        > 72 20051116.814454 8.086E-03 0.000E+00 6.290 9.205 11.148
        > 73 20051116.829974 1.547E-02 0.000E+00 4.739 -20.801 21.334
        > 74 20051116.838304 9.824E-03 -2.842E-14 4.982 12.597 13.546
        > 75 20051116.979984 9.116E-03 -2.842E-14 -3.081 -12.185 12.569
        > 76 20051116.996644 6.770E-03 -2.842E-14 5.672 -7.413 9.335
        > 77 20051117.004974 8.377E-03 0.000E+00 9.892 -5.964 11.551
        > 78 20051117.038594 2.308E-02 -2.842E-14 18.048 -26.209 31.822
        > 79 20051117.079974 4.613E-03 -2.842E-14 6.361 0.062 6.361
        > 80 20051117.088304 1.410E-02 0.000E+00 16.087 -10.912 19.438
        > 81 20051117.104974 1.532E-02 -2.842E-14 0.310 -21.127 21.130
        > 82 20051117.121644 2.040E-02 -2.842E-14 10.636 -26.045 28.133
        > 83 20051117.129974 1.713E-02 -2.842E-14 10.018 -21.394 23.624
        > 84 20051117.146644 1.556E-02 0.000E+00 21.454 -0.009 21.454
        > 85 20051117.163514 2.429E-03 -2.842E-14 2.022 2.670 3.350
        > 86 20051117.171644 1.131E-02 0.000E+00 12.713 9.021 15.589
        > 87 20051117.321644 2.320E-02 -2.842E-14 5.568 31.498 31.986
        > 88 20051117.346644 2.156E-02 -5.684E-14 -16.700 24.598 29.732
        > 89 20051117.363304 1.069E-02 0.000E+00 4.814 -13.938 14.746
        > 90 20051117.388304 2.102E-02 0.000E+00 -28.271 6.387 28.983
        > 91 20051117.405244 8.250E-03 -2.842E-14 -3.210 10.913 11.375
        > 92 20051117.431624 3.289E-02 0.000E+00 45.332 -1.458 45.355
        > 93 20051117.446644 1.533E-02 0.000E+00 6.427 20.142 21.142
        > 94 20051117.471644 6.419E-03 0.000E+00 -6.599 5.897 8.850
        > 95 20051117.488304 7.821E-03 -2.842E-14 -4.823 9.645 10.784
        > 96 20051117.513314 5.715E-03 0.000E+00 -6.185 4.883 7.880
        > 97 20051117.529984 2.013E-02 -2.842E-14 -18.262 20.902 27.755
        > 98 20051117.571644 1.004E-02 0.000E+00 13.529 2.921 13.841
        > 99 20051117.596654 1.268E-02 0.000E+00 -17.274 2.652 17.477
        > 100 20051117.613324 2.171E-02 -2.842E-14 15.316 25.726 29.940
        > 101 20051117.638304 6.690E-03 -2.842E-14 1.022 9.167 9.224
        > 102 20051117.655244 2.658E-02 -2.842E-14 -19.447 31.069 36.653
        > 103 20051117.679974 9.147E-03 0.000E+00 -4.317 11.849 12.611
        > 104 20051117.696644 1.981E-02 2.842E-14 -12.342 24.365 27.313
        > 105 20110717.630120 1.885E-02 -5.684E-14 10.688 23.686 25.986
        > 106 20110717.638470 1.002E-02 -2.842E-14 1.188 13.766 13.817
        > 107 20110717.646790 6.403E-03 -5.684E-14 6.205 6.279 8.828
        > 108 20110717.655120 2.085E-02 -2.842E-14 -27.652 -7.878 28.752
        > 109 20110717.663470 1.207E-02 -5.684E-14 -13.185 -10.149 16.639
        > 110 20110717.713470 9.044E-03 -5.684E-14 2.897 -12.128 12.469
        > 111 20110717.721800 6.671E-03 2.842E-14 -8.339 3.883 9.198
        > 112 20110717.730120 1.038E-02 -2.842E-14 -3.962 13.755 14.314
        > 113 20110717.738450 1.531E-02 -2.842E-14 2.199 20.993 21.108
        > 114 20110717.746790 7.418E-03 -5.684E-14 1.597 10.102 10.228
        > 115 20110717.796800 1.148E-03 -2.842E-14 1.018 -1.212 1.583
        > 116 20110717.805120 8.890E-03 -5.684E-14 0.833 -12.229 12.257
        > 117 20110717.813450 4.412E-03 -2.842E-14 5.721 2.067 6.083
        > 118 20110717.821790 1.121E-02 -5.684E-14 1.553 15.380 15.458
        > 119 20110717.830120 7.445E-03 -2.842E-14 1.739 10.116 10.265
        > 120 20110717.883750 1.664E-02 -2.842E-14 1.134 22.918 22.946
        > 121 20110717.888450 3.476E-03 -2.842E-14 2.271 -4.221 4.793
        > 122 20110717.896800 2.793E-03 -2.842E-14 -3.851 -0.049 3.852
        > 123 20110717.905120 1.155E-02 -8.527E-14 13.263 8.805 15.920
        > 124 20110717.913450 2.184E-02 0.000E+00 -30.106 -0.041 30.106
        > RMS -------------- 1.025E-02 2.889E-14 9.478 10.492 14.139
        >
        >
        > On 19 Jul 2011, at 0:00, Rainer Kracht wrote:
        >
        > > Hi,
        > >
        > > from C3 images 2011 July 17 15:06 - 21:34 UTC:
        > >
        > > SOHO2115 S2011 07 17.62934 07 31 35.95 +20 57 09.0 7.51R 249
        > > SOHO2115 s2011 07 17.62934 2 -0.00481836 +0.00970847 +0.00328107 249
        > > SOHO2115 S2011 07 17.63769 07 31 46.02 +20 57 41.2 7.21R 249
        > > SOHO2115 s2011 07 17.63769 2 -0.00481861 +0.00970839 +0.00328102 249
        > > SOHO2115 S2011 07 17.64601 07 31 57.15 +20 58 15.7 7.18R 249
        > > SOHO2115 s2011 07 17.64601 2 -0.00481885 +0.00970831 +0.00328098 249
        > > SOHO2115 S2011 07 17.65434 07 32 05.58 +20 58 43.6 6.90R 249
        > > SOHO2115 s2011 07 17.65434 2 -0.00481910 +0.00970822 +0.00328093 249
        > > SOHO2115 S2011 07 17.66269 07 32 17.55 +20 59 23.5 7.05R 249
        > > SOHO2115 s2011 07 17.66269 2 -0.00481935 +0.00970814 +0.00328089 249
        > > SOHO2115 S2011 07 17.71269 07 33 25.56 +21 03 34.2 6.87R 249
        > > SOHO2115 s2011 07 17.71269 2 -0.00482083 +0.00970765 +0.00328063 249
        > > SOHO2115 S2011 07 17.72102 07 33 36.13 +21 04 32.3 6.72R 249
        > > SOHO2115 s2011 07 17.72102 2 -0.00482108 +0.00970757 +0.00328059 249
        > > SOHO2115 S2011 07 17.72934 07 33 47.87 +21 05 24.2 6.90R 249
        > > SOHO2115 s2011 07 17.72934 2 -0.00482132 +0.00970749 +0.00328054 249
        > > SOHO2115 S2011 07 17.73767 07 33 59.82 +21 06 13.5 6.42R 249
        > > SOHO2115 s2011 07 17.73767 2 -0.00482157 +0.00970741 +0.00328050 249
        > > SOHO2115 S2011 07 17.74601 07 34 11.37 +21 06 44.7 6.63R 249
        > > SOHO2115 s2011 07 17.74601 2 -0.00482182 +0.00970732 +0.00328046 249
        > > SOHO2115 S2011 07 17.79602 07 35 22.33 +21 10 45.1 6.65R 249
        > > SOHO2115 s2011 07 17.79602 2 -0.00482331 +0.00970683 +0.00328020 249
        > > SOHO2115 S2011 07 17.80434 07 35 34.38 +21 11 15.8 6.53R 249
        > > SOHO2115 s2011 07 17.80434 2 -0.00482356 +0.00970675 +0.00328015 249
        > > SOHO2115 S2011 07 17.81267 07 35 46.88 +21 12 11.8 6.62R 249
        > > SOHO2115 s2011 07 17.81267 2 -0.00482380 +0.00970667 +0.00328011 249
        > > SOHO2115 S2011 07 17.82101 07 35 58.82 +21 13 06.8 6.61R 249
        > > SOHO2115 s2011 07 17.82101 2 -0.00482405 +0.00970659 +0.00328007 249
        > > SOHO2115 S2011 07 17.82934 07 36 11.13 +21 13 43.1 6.50R 249
        > > SOHO2115 s2011 07 17.82934 2 -0.00482430 +0.00970651 +0.00328003 249
        > > SOHO2115 S2011 07 17.88297 07 37 32.02 +21 18 21.3 6.34R 249
        > > SOHO2115 s2011 07 17.88297 2 -0.00482590 +0.00970598 +0.00327975 249
        > > SOHO2115 S2011 07 17.88767 07 37 39.34 +21 18 17.2 6.27R 249
        > > SOHO2115 s2011 07 17.88767 2 -0.00482604 +0.00970593 +0.00327973 249
        > > SOHO2115 S2011 07 17.89602 07 37 51.82 +21 19 02.2 6.35R 249
        > > SOHO2115 s2011 07 17.89602 2 -0.00482629 +0.00970585 +0.00327969 249
        > > SOHO2115 S2011 07 17.90434 07 38 05.99 +21 19 51.6 6.20R 249
        > > SOHO2115 s2011 07 17.90434 2 -0.00482654 +0.00970577 +0.00327964 249
        > > SOHO2115 S2011 07 17.91267 07 38 15.92 +21 20 23.2 6.20R 249
        > > SOHO2115 s2011 07 17.91267 2 -0.00482679 +0.00970569 +0.00327960 249
        > >
        > > Rainer
        > >
        > >
        > > ------------------------------------
        > >
        > > Yahoo! Groups Links
        > >
        > >
        > >
        >
        >


        --
        --------------------------------------------
        Dr. Sebastian F. Hoenig
        DFG Fellow
        UCSB Department of Physics
        Broida Hall 2015H
        Santa Barbara, CA
        93106-9530
        Phone: +1-805-893-2246
        Skype: sfhoenig
      • Rainer Kracht
        Hi Sebastian, such bright Marsden comets are quite rare, I don t think there will be another one in the next couple of weeks (but they do what they want, let s
        Message 3 of 8 , Jul 19, 2011
          Hi Sebastian,

          such bright Marsden comets are quite rare,
          I don't think there will be another one in the next couple
          of weeks (but they do what they want, let's see what happens).

          The pure gravitational solution/prediction for C/2000 C4 =
          C/2005 W1 is here:
          http://www.oaa.gr.jp/~oaacs/nk/nk1620.htm
          with perihelion 2011 August 17.7.

          The non-grav parameter A2 is needed to change the perihelion
          date to July 18. A1 is not well determined and could be set
          to zero without increasing the residuals very much (RMS 14.4"
          instead of 14.1").

          Cheers, Rainer


          On 19 Jul 2011, at 12:22, Sebastian F. Hoenig wrote:

          > Hi Rainer,
          >
          > this looks indeed like a good match. Let's no no other Marsden-group comet shows up in the next couple of weeks which would mess up things... :)
          >
          > I note that you used non-grav parameters. Can you also reproduce the result without them?
          >
          > Cheers,
          > Sebastian
          >
        • Sergei Schmalz
          Dear all, yesterday I reported a possible Kreutz group comet on C2 as: Jul 24 2011 13:19:29 Potential comet: Images: C2; 1024x1024 images. (0,0) Upper Left.
          Message 4 of 8 , Jul 25, 2011
            Dear all,

            yesterday I reported a possible Kreutz group comet on C2 as:

            Jul 24 2011 13:19:29
            Potential comet:
            Images: C2; 1024x1024 images.
            (0,0) Upper Left.
            20110724
            Kreutz group comet.
            1648 1018 835
            1700 1002 824
            1712 983 812
            --Sergei Schmalz

            Then I retracted my claim, because the object disappeared then. Well, actually, there is something on the image of 1724, too! But after that it disappeared for sure! Today I was notified by Alexander Godunov that C2 Kreutz-group comets have short track in July. He's given me the following link to show that:

            http://www.mikeoates.org/comets/c2paths.htm

            Well, I'm still quite an inexperienced sohohunter and I thought that it was a false object, but it looks like Alexander could be right on that. So, how do you think, was that object a true Kreutz-group comet? If yes, may I re-claim the discovery by this email?

            With best regards
            Sergei Schmalz
          • Rainer Kracht
            Hi Sergei, I don t think that this is a real Kreutz comet. It moves a bit too fast and diverges from the track of the Kreutz group comets. It looks like the
            Message 5 of 8 , Jul 25, 2011
              Hi Sergei,

              I don't think that this is a real Kreutz comet.
              It moves a bit too fast and diverges from the
              track of the Kreutz group comets.

              It looks like the other noise close to it.

              Regards, Rainer


              On 25 Jul 2011, at 12:45, Sergei Schmalz wrote:

              > Dear all,
              >
              > yesterday I reported a possible Kreutz group comet on C2 as:
              >
              > Jul 24 2011 13:19:29
              > Potential comet:
              > Images: C2; 1024x1024 images.
              > (0,0) Upper Left.
              > 20110724
              > Kreutz group comet.
              > 1648 1018 835
              > 1700 1002 824
              > 1712 983 812
              > --Sergei Schmalz
              >
              > Then I retracted my claim, because the object disappeared then. Well, actually, there is something on the image of 1724, too! But after that it disappeared for sure! Today I was notified by Alexander Godunov that C2 Kreutz-group comets have short track in July. He's given me the following link
              to show that:
              >
              > http://www.mikeoates.org/comets/c2paths.htm
              >
              > Well, I'm still quite an inexperienced sohohunter and I thought that it was a false object, but it looks like Alexander could be right on that. So, how do you think, was that object a true Kreutz-group comet? If yes, may I re-claim the discovery by this email?
              >
              > With best regards
              > Sergei Schmalz
              >
              >
              > ------------------------------------
              >
              > Yahoo! Groups Links
              >
              >
              >
            • Sergei Schmalz
              Rainer et al, In my first email I forgot to mention one more argument from Alexander. He reported yesterday a Kreutz-group comet on C3 as: Jul 24 2011 14:06:02
              Message 6 of 8 , Jul 25, 2011
                Rainer et al,

                In my first email I forgot to mention one more argument from Alexander. He reported yesterday a Kreutz-group comet on C3 as:

                Jul 24 2011 14:06:02
                Potential comet:
                Images: C3; 1024x1024 images.
                (0,0) Upper Left.
                2011-07-24
                Kreutz group comet.
                1554 621 548
                1606 620 547
                1618 619 546
                1630 618 545
                1642 617 544
                1654 616 543
                --Alexander Godunov

                and later on as:

                Jul 24 2011 14:11:40
                Further to my post of...
                Images: C3; 1024x1024 images.
                (0,0) Upper Left.
                2011-07-24 14:06:02
                Kreutz group comet.
                1706 615 542
                1718 615 541
                --Alexander Godunov

                Well, he retracted the claim today, but he believes, that this is the same object as the one that I reported on C2. I couldnt transform his last C3 coordinates to compare them to my first C2 coordinates, but this could be true, so that the object is probably also true, be it a Kreutz-group or a non-group comet, whatever it is.

                Please, take Alexander's report in consideration and judge again, if that was the same object, and if so, then wasnt that a real one?

                With best regards
                Sergei Schmalz
              • Rainer Kracht
                Hi Sergei, I have looked at Alexander s claim yesterday and saw that all his eight C3 positions are also in C2, but there is nothing. So it s real noise. The
                Message 7 of 8 , Jul 25, 2011
                  Hi Sergei,

                  I have looked at Alexander's claim yesterday and saw that
                  all his eight C3 positions are also in C2, but there is
                  nothing. So it's real noise.

                  The velocity from his positions is much too slow for
                  a Kreutz, while yours is too high.

                  Regards, Rainer


                  On 25 Jul 2011, at 19:27, Sergei Schmalz wrote:

                  > Rainer et al,
                  >
                  > In my first email I forgot to mention one more argument from Alexander. He reported yesterday a Kreutz-group comet on C3 as:
                  >
                  > Jul 24 2011 14:06:02
                  > Potential comet:
                  > Images: C3; 1024x1024 images.
                  > (0,0) Upper Left.
                  > 2011-07-24
                  > Kreutz group comet.
                  > 1554 621 548
                  > 1606 620 547
                  > 1618 619 546
                  > 1630 618 545
                  > 1642 617 544
                  > 1654 616 543
                  > --Alexander Godunov
                  >
                  > and later on as:
                  >
                  > Jul 24 2011 14:11:40
                  > Further to my post of...
                  > Images: C3; 1024x1024 images.
                  > (0,0) Upper Left.
                  > 2011-07-24 14:06:02
                  > Kreutz group comet.
                  > 1706 615 542
                  > 1718 615 541
                  > --Alexander Godunov
                  >
                  > Well, he retracted the claim today, but he believes, that this is the same object as the one that I reported on C2. I couldnt transform his last C3 coordinates to compare them to my first C2 coordinates, but this could be true, so that the object is probably also true, be it a Kreutz-group or a
                  non-group comet, whatever it is.
                  >
                  > Please, take Alexander's report in consideration and judge again, if that was the same object, and if so, then wasnt that a real one?
                  >
                  > With best regards
                  > Sergei Schmalz
                  >
                  >
                  > ------------------------------------
                  >
                  > Yahoo! Groups Links
                  >
                  >
                  >
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