• Processing (Info)

  • MPEC 1998-Y41 : COMET P/1998 Y2 (LI)

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    M.P.E.C. 1998-Y41                                Issued 1998 Dec. 30, 16:48 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  They are published
       on behalf of Commission 20 of the International Astronomical Union by the
              Minor Planet Center, Smithsonian Astrophysical Observatory,
                              Cambridge, MA 02138, U.S.A.
    
                 BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
                       URL http://cfa-www.harvard.edu/iau/mpc.html
    
                                 COMET P/1998 Y2 (LI)
    
    Observations:
        PJ98Y020  C1998 09 23.35729 03 21 38.23 -14 40 10.4                      703
        PJ98Y020  C1998 09 23.41692 03 21 38.46 -14 40 26.1                      703
        PJ98Y020  C1998 10 28.33932 03 09 56.57 -15 36 59.3                      703
        PJ98Y020  C1998 10 28.34941 03 09 56.18 -15 36 58.3                      703
        PJ98Y020  C1998 10 29.32343 03 09 15.91 -15 34 45.4                      703
        PJ98Y020  C1998 10 29.33176 03 09 15.57 -15 34 43.5                      703
        PJ98Y020  C1998 12 26.23575 02 40 26.37 -05 25 56.4          16.2 T      662
        PJ98Y020  C1998 12 26.26623 02 40 26.47 -05 25 27.3          16.1 T      662
        PJ98Y020  C1998 12 27.31124 02 40 32.08 -05 08 39.7          15.3 T      662
        PJ98Y020  C1998 12 27.31584 02 40 32.12 -05 08 34.1          15.3 T      662
        PJ98Y020  C1998 12 27.32030 02 40 32.08 -05 08 29.5          15.5 T      662
        PJ98Y020  C1998 12 28.00613 02 40 37.04 -04 57 25.8          15.0 T      761
        PJ98Y020  C1998 12 28.00845 02 40 36.60 -04 57 23.8                      958
        PJ98Y020  C1998 12 28.01296 02 40 36.86 -04 57 17.9                      958
        PJ98Y020  C1998 12 28.02951 02 40 37.28 -04 57 02.8                      761
        PJ98Y020  C1998 12 28.04815 02 40 37.20 -04 56 43.1                      761
        PJ98Y020  C1998 12 28.13387 02 40 37.85 -04 55 23.0          15.5 T      734
        PJ98Y020  C1998 12 28.14006 02 40 37.87 -04 55 17.3                      734
        PJ98Y020  C1998 12 28.16014 02 40 37.99 -04 54 57.8                      734
        PJ98Y020  C1998 12 28.59207 02 40 41.13 -04 47 56.2                      900
        PJ98Y020  C1998 12 28.59581 02 40 41.17 -04 47 56.0          17.1 T      900
        PJ98Y020  C1998 12 28.60942 02 40 41.39 -04 47 41.5          16.0 T      402
        PJ98Y020  C1998 12 28.61081 02 40 41.39 -04 47 40.9                      402
        PJ98Y020  C1998 12 28.61220 02 40 41.41 -04 47 39.1                      402
        PJ98Y020  C1998 12 28.61359 02 40 41.45 -04 47 37.6                      402
        PJ98Y020  C1998 12 28.69056 02 40 42.38 -04 46 22.7                      046
        PJ98Y020  C1998 12 28.69215 02 40 42.40 -04 46 21.9                      046
        PJ98Y020  C1998 12 28.69293 02 40 42.35 -04 46 20.9                      046
        PJ98Y020  C1998 12 28.69608 02 40 42.45 -04 46 18.8                      046
        PJ98Y020  C1998 12 29.49545 02 40 49.46 -04 33 19.1          15.5 T      327
        PJ98Y020  C1998 12 29.51586 02 40 49.59 -04 32 59.9                      327
        PJ98Y020  C1998 12 29.54622 02 40 49.86 -04 32 26.5                      327
        PJ98Y020  C1998 12 29.83900 02 40 52.86 -04 27 44.0                      611
        PJ98Y020  C1998 12 29.86157 02 40 52.95 -04 27 23.9                      611
    
    Observer details:
    046 Klet.  Observers J. Ticha, M. Tichy.  Measurer M. Tichy.  0.57-m f/5.2
        reflector + CCD.
    327 Peking Observatory, Xinglong Station.  Observers Y. Qiu, Q. Qiao.
        0.6-m Schmidt + CCD.
    402 Dynic Astronomical Observatory.  Observer A. Sugie.  0.60-m f/3.7 reflector
        + CCD.
    611 Starkenburg.  Observers M. Busch, R. Stoss.  Measurer M. Busch.
        0.45-m f/4.4 reflector + CCD.
    662 Lick Observatory.  Observer W.-d. Li.  0.8-m KAIT.
    703 Catalina Sky Survey.  Observer T. B. Spahr.  0.41-m f/3 Schmidt + CCD.
    734 Farpoint Observatory.  Observers G. Hug, G. Bell.  0.30-m
        Schmidt-Cassegrain + CCD.
    761 Zephyrhills.  Observer R. A. Kowalski.  0.18-m f/9 reflector + CCD.
    900 Moriyama.  Observer Y. Ikari.  0.25-m f/6.3 reflector + CCD.
    958 Dax.  Observers P. Dupouy, P. Marechal.  Measurer P. Marechal.
        0.32-m f/5.7 reflector + CCD.
    
    Orbital elements:
        P/1998 Y2 (Li)
    Epoch 1998 Dec. 13.0 TT = JDT 2451160.5
    T 1998 Dec. 17.8922 TT                                  Marsden
    q   2.518843             (2000.0)            P               Q
    n   0.0650340      Peri.  319.0104      +0.5732985      -0.7083947
    a   6.124103       Node    91.8286      +0.8171618      +0.4576726
    e   0.588700       Incl.   24.3255      +0.0597948      +0.5373200
    P  15.2
    From 30 observations 1998 Sept. 23-Dec. 29, mean residual 0".7.
    
    Ephemeris:
        P/1998 Y2 (Li)
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
    1998 12 23    02 40.33   -06 17.4    1.855    2.519   122.1    19.3  14.9
    1998 12 28    02 40.61   -04 57.5    1.903    2.520   118.1    20.1  14.9
    1999 01 02    02 41.53   -03 36.1    1.953    2.522   114.2    20.8  15.0
    1999 01 07    02 43.06   -02 13.8    2.008    2.524   110.4    21.4  15.0
    1999 01 12    02 45.18   -00 51.3    2.065    2.527   106.6    21.9  15.1
    1999 01 17    02 47.87   +00 31.1    2.124    2.531   102.8    22.3  15.2
    1999 01 22    02 51.10   +01 53.0    2.186    2.536    99.1    22.5  15.2
    1999 01 27    02 54.83   +03 13.9    2.250    2.541    95.5    22.7  15.3
    1999 02 01    02 59.04   +04 33.6    2.315    2.547    91.9    22.7  15.4
    1999 02 06    03 03.69   +05 51.9    2.382    2.553    88.5    22.7  15.5
    1999 02 11    03 08.76   +07 08.5    2.449    2.560    85.0    22.6  15.5
    1999 02 16    03 14.21   +08 23.3    2.517    2.568    81.7    22.4  15.6
    1999 02 21    03 20.03   +09 36.1    2.586    2.576    78.4    22.1  15.7
    1999 02 26    03 26.18   +10 46.8    2.655    2.585    75.1    21.7  15.7
    1999 03 03    03 32.64   +11 55.3    2.725    2.594    71.9    21.3  15.8
    1999 03 08    03 39.38   +13 01.6    2.794    2.605    68.8    20.8  15.9
    1999 03 13    03 46.40   +14 05.4    2.862    2.615    65.7    20.3  16.0
    1999 03 18    03 53.66   +15 06.9    2.931    2.627    62.6    19.7  16.0
    1999 03 23    04 01.16   +16 05.9    2.998    2.638    59.6    19.0  16.1
    1999 03 28    04 08.86   +17 02.4    3.065    2.651    56.7    18.3  16.2
    1999 04 02    04 16.76   +17 56.3    3.130    2.664    53.7    17.6  16.2
    1999 04 07    04 24.84   +18 47.6    3.195    2.677    50.8    16.8  16.3
    1999 04 12    04 33.08   +19 36.3    3.258    2.691    47.9    16.1  16.4
    1999 04 17    04 41.47   +20 22.3    3.319    2.706    45.1    15.2  16.4
    1999 04 22    04 50.00   +21 05.7    3.379    2.721    42.3    14.4  16.5
    1999 04 27    04 58.65   +21 46.5    3.437    2.736    39.5    13.5  16.6
    1999 05 02    05 07.39   +22 24.6    3.493    2.752    36.7    12.6  16.6
    1999 05 07    05 16.23   +23 00.1    3.548    2.768    33.9    11.7  16.7
    1999 05 12    05 25.15   +23 33.0    3.600    2.785    31.2    10.8  16.7
    
    Brian G. Marsden             (C) Copyright 1998 MPC           M.P.E.C. 1998-Y41
    

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