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IAUC 5893: 1993e

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                                                  Circular No. 5893
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


PERIODIC COMET SHOEMAKER-LEVY 9 (1993e)
     The new orbit computations (IAUC 5892) demonstrate that it is
absolutely certain that all of the individual nuclei observed by
Spacewatch will pass some 0.0002 AU from the center of Jupiter (the
radius of which is 0.0005 AU) in July 1994, the computed collision
times being as follows: nucleus 17, July 18.7 UT; 15, 19.1;
14, 19.6; 12, 20.2; 11, 20.9; 7, 21.6; 6, 22.1; 5, 22.7; 1, 23.2.  On
July 17.0 this portion of the train will extend 14 arcmin in p.a.
61-241 deg.  The ephemeris below is for nucleus 7, but the magnitude
is a guess for the total comet.  Now that the basic dynamical history of
the comet has been established, observers are requested to provide
astrometric measurements (preferably using CCDs) only of the individual
nuclei, not of the "center of the train"; separations between nuclei
can be quoted with precision better than 0.1 arcsec if circumstances allow.

1993/94     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Nov. 29    13 58.25    -12 58.8    6.185    5.405   34.8    6.0     14.3
Dec.  9    14 05.83    -13 38.6    6.081    5.403   43.0    7.1     14.2
     19    14 12.99    -14 15.2    5.960    5.400   51.3    8.2     14.2
     29    14 19.59    -14 48.1    5.825    5.398   59.8    9.1     14.1
Jan.  8    14 25.52    -15 16.8    5.678    5.396   68.5    9.8     14.1
     18    14 30.67    -15 40.9    5.522    5.394   77.4   10.3     14.0
     28    14 34.90    -16 00.0    5.361    5.392   86.5   10.5     14.0
Feb.  7    14 38.11    -16 13.7    5.199    5.390   95.8   10.5     13.9
     17    14 40.19    -16 21.7    5.040    5.388  105.4   10.2     13.8
     27    14 41.07    -16 23.8    4.889    5.387  115.3    9.6     13.8
Mar.  9    14 40.74    -16 19.7    4.749    5.386  125.4    8.6     13.7
     19    14 39.22    -16 09.7    4.626    5.385  135.8    7.4     13.6
     29    14 36.62    -15 53.8    4.524    5.384  146.4    5.9     13.6
Apr.  8    14 33.13    -15 32.9    4.447    5.383  157.1    4.1     13.5
     18    14 29.00    -15 07.9    4.397    5.383  168.0    2.2     13.5
     28    14 24.54    -14 40.3    4.377    5.383  178.9    0.2     13.5
May   8    14 20.11    -14 11.7    4.387    5.384  170.2    1.8     13.5
     18    14 16.04    -13 44.0    4.426    5.385  159.4    3.8     13.5
     28    14 12.64    -13 18.8    4.493    5.386  148.9    5.6     13.6
June  7    14 10.13    -12 57.6    4.585    5.389  138.6    7.1     13.6
     17    14 08.70    -12 41.2    4.698    5.392  128.7    8.5     13.7
     27    14 08.47    -12 30.2    4.829    5.396  119.0    9.5     13.7
July  7    14 09.51    -12 24.3    4.973    5.401  109.7   10.2     13.8
     17    14 11.96    -12 22.0    5.128    5.410  100.7   10.6     13.9


1993 November 22               (5893)              Brian G. Marsden

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