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Fw: AstroAlert: Comet LINEAR in Outburst

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  • Chris Mazzola
    Too bad this didn t happen in November... -Chris ... From: Roger W. Sinnott To: Sent: Wednesday, January 30, 2002
    Message 1 of 1 , Jan 31, 2002
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      Too bad this didn't happen in November...

      -Chris


      ----- Original Message -----
      From: "Roger W. Sinnott" <rsinnott@...>
      To: <comet@...>
      Sent: Wednesday, January 30, 2002 10:39 AM
      Subject: AstroAlert: Comet LINEAR in Outburst


      > ==================================================================
      > This Is SKY & TELESCOPE's AstroAlert for Comets
      > ==================================================================
      >
      >
      > COMET LINEAR (C/2000 WM1) IN OUTBURST
      >
      >
      > Greg Bryant of Sydney, Australia, reports that this comet
      > appears to be undergoing an outburst. On the morning of
      > January 30th, the comet was visible to the naked eye
      > despite the presence of a very bright gibbous Moon.
      >
      > Unusual behavior had been noticed several days earlier by
      > by Andrew Pearce of Nedlands, Western Australia. In
      > 20 x 80 binoculars, Pearce found the comet to be magnitude
      > 4.6 on January 28th (local date) even though it had
      > been only 6.2 the previous morning (four times fainter).
      > His reports are posted on JPL's Comet Observation Page
      > ( http://encke.jpl.nasa.gov ).
      >
      > On January 30th, Michael Mattiazzo of Wallaroo, South
      > Australia, told members of the Minor Planet Mailing List
      > (MPML) that the comet looked "virtually starlike to the
      > eye, but 25 x 100mm binoculars reveal two bright jets
      > emanating from opposite poles of the nucleus." He put
      > its magnitude at 3.0, slightly brighter than the
      > star Phi Sagittarii. (For more about the MPML, or to
      > subscribe, visit http://www.bitnik.com/mp ).
      >
      > The comet is not currently visible from the Northern
      > Hemisphere. But viewing prospects will continue to
      > improve for observers south of the equator. For example,
      > as seen from latitude 35 degrees south, here is the
      > comet's altitude at the start of morning twilight and
      > the phase of the Moon (when up) on selected dates:
      >
      > Date Comet alt. Moon
      > (deg)
      > Jan 30 11 Gibbous
      > Feb 4 12 Last quarter
      > Feb 9 17 Thin crescent
      > Feb 14 20 (none)
      > Feb 19 24 (none)
      > Feb 24 27 Full
      > Mar 1 31 Gibbous
      > Mar 6 34 Last quarter
      > Mar 11 37 Thin crescent
      > Mar 16 40 (none)
      > Mar 21 42 (none)
      >
      >
      > The following ephemeris gives the comet's right ascension and
      > declination (equinox 2000.0) at 0h Universal Time each day,
      > followed by its distance from Earth (Delta) and Sun (r) in
      > astronomical units. Also given are its elongation from the
      > Sun, approximate magnitude, and constellation. The magnitudes
      > are those predicted (for the apparition as a whole) by John
      > Bortle *before* the recent outburst, which may or may not
      > continue.
      >
      >
      > Comet LINEAR, C/2000 WM1
      >
      > 2002 RA (2000) Dec Delta r Elong. Mag. Const.
      > 0h UT h m o ' au au o
      > Jan 28 19 56.6 -48 33 1.079 0.569 31.6 5.2 Tel
      > Jan 29 19 53.6 -47 52 1.089 0.574 31.6 5.3 Tel
      > Jan 30 19 50.9 -47 09 1.099 0.580 31.7 5.3 Tel
      > Jan 31 19 48.3 -46 25 1.108 0.587 31.9 5.4 Tel
      > Feb 1 19 45.9 -45 40 1.117 0.595 32.1 5.4 Tel
      > Feb 2 19 43.7 -44 54 1.125 0.604 32.4 5.5 Sgr
      > Feb 3 19 41.7 -44 07 1.133 0.613 32.7 5.6 Sgr
      > Feb 4 19 39.9 -43 19 1.141 0.623 33.0 5.6 Sgr
      > Feb 5 19 38.3 -42 31 1.148 0.633 33.4 5.7 Sgr
      > Feb 6 19 36.7 -41 43 1.155 0.644 33.9 5.8 Sgr
      > Feb 7 19 35.4 -40 54 1.161 0.656 34.3 5.9 Sgr
      > Feb 8 19 34.1 -40 04 1.167 0.668 34.8 5.9 Sgr
      > Feb 9 19 33.0 -39 15 1.173 0.680 35.4 6.0 Sgr
      > Feb 10 19 32.0 -38 25 1.179 0.693 36.0 6.1 Sgr
      > Feb 11 19 31.1 -37 35 1.184 0.706 36.6 6.2 Sgr
      > Feb 12 19 30.2 -36 45 1.189 0.720 37.2 6.2 Sgr
      > Feb 13 19 29.5 -35 55 1.193 0.733 37.9 6.3 Sgr
      > Feb 14 19 28.8 -35 05 1.197 0.748 38.5 6.4 Sgr
      > Feb 15 19 28.2 -34 15 1.201 0.762 39.2 6.5 Sgr
      > Feb 16 19 27.7 -33 25 1.205 0.777 40.0 6.5 Sgr
      > Feb 17 19 27.2 -32 35 1.208 0.791 40.7 6.6 Sgr
      > Feb 18 19 26.8 -31 46 1.211 0.807 41.5 6.7 Sgr
      > Feb 19 19 26.4 -30 56 1.214 0.822 42.3 6.7 Sgr
      > Feb 20 19 26.1 -30 06 1.217 0.837 43.1 6.8 Sgr
      > Feb 21 19 25.7 -29 17 1.219 0.853 43.9 6.9 Sgr
      > Feb 22 19 25.5 -28 27 1.222 0.868 44.7 6.9 Sgr
      > Feb 23 19 25.2 -27 38 1.224 0.884 45.6 7.0 Sgr
      > Feb 24 19 25.0 -26 49 1.226 0.900 46.4 7.1 Sgr
      > Feb 25 19 24.8 -26 00 1.227 0.916 47.3 7.1 Sgr
      > Feb 26 19 24.6 -25 11 1.229 0.932 48.2 7.2 Sgr
      > Feb 27 19 24.4 -24 22 1.230 0.948 49.1 7.3 Sgr
      > Feb 28 19 24.2 -23 33 1.231 0.964 50.0 7.3 Sgr
      > Mar 1 19 24.0 -22 44 1.233 0.980 50.9 7.4 Sgr
      > Mar 2 19 23.9 -21 55 1.234 0.996 51.8 7.4 Sgr
      > Mar 3 19 23.7 -21 07 1.234 1.012 52.7 7.5 Sgr
      > Mar 4 19 23.5 -20 18 1.235 1.029 53.7 7.6 Sgr
      > Mar 5 19 23.4 -19 29 1.236 1.045 54.6 7.6 Sgr
      > Mar 6 19 23.2 -18 41 1.236 1.061 55.6 7.7 Sgr
      > Mar 7 19 23.0 -17 53 1.237 1.078 56.5 7.7 Sgr
      > Mar 8 19 22.8 -17 04 1.237 1.094 57.5 7.8 Sgr
      > Mar 9 19 22.6 -16 16 1.237 1.110 58.5 7.8 Sgr
      > Mar 10 19 22.4 -15 28 1.237 1.127 59.5 7.9 Sgr
      > Mar 11 19 22.2 -14 39 1.238 1.143 60.5 7.9 Sgr
      > Mar 12 19 22.0 -13 51 1.238 1.159 61.4 8.0 Sgr
      > Mar 13 19 21.7 -13 03 1.238 1.175 62.4 8.0 Sgr
      > Mar 14 19 21.4 -12 15 1.238 1.192 63.4 8.1 Sgr
      > Mar 15 19 21.1 -11 26 1.238 1.208 64.5 8.1 Aql
      > Mar 16 19 20.8 -10 38 1.238 1.224 65.5 8.2 Aql
      > Mar 17 19 20.5 - 9 50 1.238 1.241 66.5 8.2 Aql
      > Mar 18 19 20.1 - 9 02 1.238 1.257 67.5 8.3 Aql
      > Mar 19 19 19.7 - 8 14 1.237 1.273 68.5 8.3 Aql
      > Mar 20 19 19.3 - 7 26 1.237 1.289 69.6 8.3 Aql
      >
      > This ephemeris is based on Brian G. Marsden's orbital elements
      > published in Minor Planet Electronic Circular 2001-X70 of
      > Dec. 15, 2001. (NOTE: The columns of the above table will
      > line up properly if you set your e-mail program to use a
      > nonproportional type font such as Courier.)
      >
      >
      >
      > Roger W. Sinnott
      >
      > Senior Editor
      > Sky & Telescope
      >
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