Central Bureau for Astronomical Telegrams
IAUC 5416: 1991z; 1991b1
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Read IAUC 5417
Circular No. 5416
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
PERIODIC COMET SHOEMAKER-LEVY 5 (1991z)
Continuation to the ephemeris on IAUC 5376:
1991/92 R. A. (2000) Decl. Delta r Elong. Phase m1
Dec. 20 0 31.00 + 5 54.8 1.536 1.985 101.7 29.0 16.9
30 0 43.61 + 8 14.3 1.641 1.990 95.4 29.5 17.1
Jan. 9 0 58.10 +10 35.4 1.751 1.999 89.4 29.5 17.2
19 1 14.18 +12 56.2 1.864 2.011 83.8 29.1 17.4
29 1 31.62 +15 14.7 1.980 2.027 78.4 28.4 17.6
Feb. 8 1 50.24 +17 29.3 2.099 2.047 73.3 27.5 17.8
18 2 09.89 +19 38.3 2.219 2.070 68.4 26.3 18.0
PERIODIC COMET SHOEMAKER-LEVY 6 (1991b1)
Further precise positions have been reported as follows:
1991 UT R.A. (2000) Decl. m1 Observer
Nov. 25.46895 0 54 36.25 +23 02 18.8 Kobayashi
25.47487 0 54 36.98 +23 02 36.7 "
Dec. 4.51875 1 16 13.41 +29 30 17.5 16 Seki
T. Kobayashi (Oizumi). 0.16-m f/4.8 reflector + CCD.
T. Seki (Geisei).
Improved orbital elements from 9 observations Nov. 3-Dec. 4:
T = 1991 Oct. 13.863 TT Peri. = 333.131
e = 0.70631 Node = 37.929 2000.0
q = 1.13245 AU Incl. = 16.863
a = 3.85588 AU n = 0.130172 P = 7.57 years
1991/92 R. A. (2000) Decl. Delta r Elong. Phase m1
Dec. 20 1 53.09 +35 47.6 0.604 1.436 127.8 32.8 13.8
30 2 16.87 +38 00.8 0.728 1.514 123.8 32.7 14.5
Jan. 9 2 40.64 +39 24.4 0.864 1.596 119.4 32.4 15.2
19 3 04.37 +40 16.0 1.011 1.681 114.8 32.1 15.9
29 3 27.96 +40 45.9 1.168 1.767 110.0 31.6 16.5
Feb. 8 3 51.36 +41 00.3 1.335 1.854 105.0 30.9 17.1
18 4 14.54 +41 03.2 1.510 1.941 99.9 30.1 17.7
1991 December 27 (5416) Brian G. Marsden
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