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Re: [sohohunter] The return of C/2002 R1 = 2008 A3???

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  • Rainer Kracht
    Yes, this is the return of P/2002 R1 = 2008 A3. I have made these measurements with Astrometrica: 20130525 S2013 05 25.83354 04 13 30.95 +21 32 30.0
    Message 1 of 2 , May 26, 2013
      Yes, this is the return of P/2002 R1 = 2008 A3.
      I have made these measurements with Astrometrica:

      20130525 S2013 05 25.83354 04 13 30.95 +21 32 30.0 7.96R 249
      20130525 s2013 05 25.83354 2 +0.00069961 +0.01018651 +0.00395193 249
      20130525 S2013 05 25.84187 04 13 42.97 +21 33 58.8 7.22R 249
      20130525 s2013 05 25.84187 2 +0.00069882 +0.01018683 +0.00395187 249
      20130525 S2013 05 25.85854 04 14 05.58 +21 37 08.4 7.99R 249
      20130525 s2013 05 25.85854 2 +0.00069723 +0.01018746 +0.00395175 249
      20130525 S2013 05 25.86689 04 14 19.13 +21 38 19.7 7.43R 249
      20130525 s2013 05 25.86689 2 +0.00069644 +0.01018778 +0.00395170 249
      20130525 S2013 05 25.88358 04 14 38.60 +21 41 22.0 8.24R 249
      20130525 s2013 05 25.88358 2 +0.00069486 +0.01018842 +0.00395158 249
      20130525 S2013 05 25.89188 04 14 51.26 +21 42 48.3 7.02R 249
      20130525 s2013 05 25.89188 2 +0.00069407 +0.01018874 +0.00395152 249
      20130525 S2013 05 25.90021 04 15 01.48 +21 44 13.0 8.11R 249
      20130525 s2013 05 25.90021 2 +0.00069328 +0.01018905 +0.00395147 249
      20130525 S2013 05 25.90858 04 15 11.40 +21 45 45.0 7.72R 249
      20130525 s2013 05 25.90858 2 +0.00069249 +0.01018937 +0.00395141 249
      20130525 S2013 05 25.91688 04 15 21.79 +21 47 09.5 8.53R 249
      20130525 s2013 05 25.91688 2 +0.00069170 +0.01018969 +0.00395135 249
      20130525 S2013 05 25.92522 04 15 33.19 +21 48 38.8 8.19R 249
      20130525 s2013 05 25.92522 2 +0.00069091 +0.01019001 +0.00395130 249
      20130525 S2013 05 25.93354 04 15 44.02 +21 50 03.7 8.01R 249
      20130525 s2013 05 25.93354 2 +0.00069012 +0.01019033 +0.00395124 249
      20130525 S2013 05 25.94225 04 15 54.75 +21 51 34.3 8.12R 249
      20130525 s2013 05 25.94225 2 +0.00068930 +0.01019066 +0.00395118 249
      20130525 S2013 05 25.96718 04 16 26.17 +21 55 41.6 7.89R 249
      20130525 s2013 05 25.96718 2 +0.00068694 +0.01019161 +0.00395101 249
      20130525 S2013 05 25.97521 04 16 36.80 +21 56 50.5 8.11R 249
      20130525 s2013 05 25.97521 2 +0.00068618 +0.01019191 +0.00395095 249
      20130525 S2013 05 25.98354 04 16 46.80 +21 58 27.6 8.08R 249
      20130525 s2013 05 25.98354 2 +0.00068540 +0.01019223 +0.00395089 249

      and could link them with the observations of 2002 R1 and 2008 A3

      2002/ 9/ 2 JD=2452520.1813630 (ref. J2000.0) File: 2002R1.POS
      Equat. Pos. & Vel. Ecliptic Oscul. Elements
      (Gm, km/s) (deg, AU)
      Itr: 3 Converged sw= 2.8602E-03�
      e : 0.98420714 s= 1.2E-06 X0 : -3.49933393E+00 s= 8.3E-04
      i : 22.54399459 s= 3.3E-03 Y0 : 4.75953517E+00 s= 2.3E-04
      w : 33.86034368 s= 1.7E-02 Z0 : 4.50525110E+00 s= 2.5E-04
      Nod: 69.97544574 s= 6.7E-03 Vx0: -1.63505837E+02 s= 1.3E-02
      a : 3.06827367 s= 2.0E-06 Vy0: -9.15568479E+01 s= 2.7E-02
      M0: 0.02578153 s= 3.4E-05 Vz0: 1.78997886E+01 s= 1.4E-02
      Rj0: -2.89744E-08 DataPoints: 49 Time Span: 3918.303 d
      A1: 1.00000000E-25 M. Motion: 0.1833846306 s= 1.8E-07
      A2: -1.02826665E-09 s= 9.7E-13 Perih Dist : 0.04845680 s= 3.8E-06
      A3: 0.00000000E+00 Perih Long : 103.83578942 s= 7.4E-02
      AF: 1.11000000E-01 Period (JY): 5.37464 s= 5.3E-06
      Perih Time : -0.14059 s= 1.8E-04

      Orbital elements for 2013 May 25.0:

      Ecliptic Osculating Elements (J2000.0) at JD 2456437.500000 Date: 2013/05/25:00:00:00.00
      Body e i w Node q JD-Tp
      2002R1 0.984015623 22.1215959 34.5058118 69.4088395 0.048932457 -0.9541558
      T = 2013 May 25.95, A2 = -0.1028

      Cheers,
      Rainer

      Residuals:
      No Date Time dRho (Gm) dRA*(") dDec (") dAng (")

      4 20020902.68136 2452520.181363 0.000E+00 9.456 13.777 16.710
      5 20020902.68483 2452520.184833 2.842E-14 5.792 -15.187 16.254
      8 20020902.70219 2452520.202193 0.000E+00 -8.207 4.134 9.190
      9 20020902.70568 2452520.205683 -2.842E-14 -6.889 11.051 13.022
      10 20020902.71261 2452520.212613 -2.842E-14 -10.926 -1.782 11.071
      11 20020902.71608 2452520.216083 2.842E-14 -6.503 10.516 12.364
      12 20020902.72305 2452520.223053 2.842E-14 -4.399 2.581 5.100
      14 20020902.73346 2452520.233463 2.842E-14 -8.313 2.112 8.577
      15 20020902.73691 2452520.236913 2.842E-14 16.789 9.181 19.135
      16 20020902.74733 2452520.247333 0.000E+00 -1.455 10.328 10.430
      18 20020902.76469 2452520.264693 -2.842E-14 3.090 -2.170 3.776
      20 20020902.77859 2452520.278593 0.000E+00 -1.562 10.749 10.862
      21 20020902.78553 2452520.285533 -5.684E-14 0.475 -10.572 10.583
      22 20020902.78900 2452520.289003 -2.842E-14 -8.191 -3.548 8.926
      23 20020902.79659 2452520.296593 0.000E+00 7.241 8.608 11.249
      26 20020902.80983 2452520.309833 0.000E+00 -4.905 -8.871 10.137
      27 20020902.81678 2452520.316783 2.842E-14 11.101 12.977 17.077
      32 20020902.84108 2452520.341083 0.000E+00 11.356 -6.062 12.872
      33 20020902.84802 2452520.348023 2.842E-14 -9.829 -11.237 14.929
      35 20020902.85844 2452520.358443 0.000E+00 4.001 -18.668 19.092
      36 20080115.58830 2454481.088304 0.000E+00 -3.698 -9.424 10.124
      37 20080115.63135 2454481.131354 -2.842E-14 7.741 -4.489 8.948
      38 20080115.64664 2454481.146644 0.000E+00 -12.280 0.504 12.290
      39 20080115.66330 2454481.163304 -2.842E-14 8.184 2.178 8.469
      40 20080115.67163 2454481.171634 0.000E+00 -0.764 -0.949 1.218
      41 20080115.68830 2454481.188304 -2.842E-14 -10.629 -16.134 19.321
      42 20080115.70497 2454481.204974 2.842E-14 0.497 1.220 1.317
      44 20080115.97997 2454481.479974 0.000E+00 4.742 -1.190 4.889
      45 20080115.99664 2454481.496644 -5.684E-14 -6.204 5.963 8.605
      46 20080116.00497 2454481.504974 0.000E+00 -1.446 1.257 1.916
      47 20080116.02190 2454481.521904 0.000E+00 7.089 0.609 7.115
      48 20080116.03830 2454481.538304 0.000E+00 -11.461 -5.966 12.921
      49 20080116.04664 2454481.546644 -2.842E-14 2.697 -3.404 4.343
      50 20080116.06330 2454481.563304 -2.842E-14 -2.618 0.095 2.620
      51 20080116.07997 2454481.579974 0.000E+00 4.601 -2.685 5.327
      52 20080116.08830 2454481.588304 2.842E-14 3.382 3.076 4.572
      53 20080116.10497 2454481.604974 0.000E+00 5.668 -0.165 5.670
      54 20130525.83431 2456438.334306 -2.842E-14 -14.604 2.253 14.777
      55 20130525.84264 2456438.342636 -5.684E-14 -2.332 1.513 2.780
      56 20130525.85931 2456438.359306 -2.842E-14 3.233 12.754 13.157
      58 20130525.88435 2456438.384346 0.000E+00 1.710 0.730 1.859
      61 20130525.90935 2456438.409346 2.842E-14 2.319 1.619 2.828
      62 20130525.91765 2456438.417646 -2.842E-14 -3.346 -0.155 3.350
      63 20130525.92599 2456438.425986 2.842E-14 4.916 2.856 5.686
      64 20130525.93431 2456438.434306 -5.684E-14 6.207 2.084 6.547
      65 20130525.94302 2456438.443016 0.000E+00 -0.232 3.452 3.459
      66 20130525.96795 2456438.467946 0.000E+00 -4.777 -1.945 5.158
      67 20130525.97598 2456438.475976 -2.842E-14 2.179 -13.545 13.719
      68 20130525.98431 2456438.484306 -2.842E-14 -4.178 0.527 4.211
      RMS ----------------------------- 2.600E-14 6.966 7.583 10.297



      On 26 May 2013 at 2:48, peiyuansun wrote:

      > Hi all,
      >
      > Marsden group comet 2013 May 25 is the return of
      > C/2002 R1 = 2008 A3 (SOHO)???
      >
      > May 25 2013 19:54:22 Peiyuan Sun
      > Potential comet:
      > Images: C2; 1024x1024 images.
      > (0,0) Upper Left.
      > 20130525
      > Marsden group comet.
      > 2312 24 328
      > 2324 15 322
      > 2336 5 317
      > --Peiyuan Sun
      >
      > May 25 2013 20:15:16 Rainer Kracht
      > Confirming comet of:
      > 2013-05-25 19:54:22
      > Marsden group comet.
      > --Rainer Kracht
      >
      > May 25 2013 22:11:15 Peiyuan Sun
      > Further to my post of...
      > Images: C2; 1024x1024 images.
      > (0,0) Upper Left.
      > 20130525 19:54:22
      > Marsden group comet.
      > 2112 135 376
      > 2124 123 371
      > 2136 112 366
      > 2148 101 361
      > 2200 90 357
      > 2212 78 352
      > --Peiyuan Sun
      >
      > Epoch 2002 Sept. 3.0 TT = JDT 2452520.5
      > T 2002 Sept. 2.53937 TT MPC
      > q 0.0483786 (2000.0) P Q
      > n 0.18363342 Peri. 33.66510 -0.19513861 -0.91234918
      > a 3.0655017 Node 69.91968 +0.79398466 -0.36238453
      > e 0.9842184 Incl. 22.53272 +0.57576843 +0.19051619
      > P 5.37
      >
      > Epoch 2008 Jan. 15.0 TT = JDT 2454480.5
      > T 2008 Jan. 15.74887 TT MPC
      > q 0.0486856 (2000.0) P Q
      > n 0.18348019 Peri. 33.91712 -0.19587682 -0.91322641
      > a 3.0672082 Node 69.69445 +0.79376076 -0.36159327
      > e 0.9841271 Incl. 22.39288 +0.57582647 +0.18779732
      > P 5.37
      >
      > P/2002 R1 = 2008 A3 (SOHO)
      > T = 2013 June 1.11273 TT Epoch = 2013 May 28.0 TT
      > Peri. = 34.36709 e = 0.9840422
      > Node = 69.49538 (2000.0) a = 3.0682338 AU
      > Inc. = 22.11436 n'= 0.18338820
      > q = 0.0489623 AU P = 5.374 years
      > (+/- 1.21 days)
      > From 43 observations 2002-2008, mean residual 9".30.
      >
      > http://sungrazer.nrl.navy.mil/index.php?p=tables/comets_99U2
      >
      > http://www.minorplanetcenter.net/iau/mpec/K08/K08B61.html
      >
      > http://www.oaa.gr.jp/~oaacs/nk/nk1932.htm
      >
      > http://www.aerith.net/comet/catalog/2002R1/index.html
      >
      > Regards,
      > Peiyuan
      >
      >
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