Central Bureau for Astronomical Telegrams
IAUC 4469: 1987y; 1987 SL; 1987 SJ3
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Read IAUC 4470
Circular No. 4469
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET LEVY (1987y)
T. Seki, Geisei, provides the following precise position:
1987 UT R.A. (1950) Decl. m1
Oct. 13.40972 14 46 35.67 +17 05 06.8 10
1987 SL
The following precise positions were obtained by B. A. Skiff
and E. Bowell at the Lowell Observatory Anderson Mesa Station:
1987 UT R.A. (1950) Decl. Mag.
Sept.19.32815 1 28 56.75 +24 33 02.9 16.2
19.37859 1 28 50.24 +24 34 52.0
29.31404 1 05 59.86 +29 04 57.1 16.2
29.35941 1 05 53.32 +29 05 52.7
Improved orbital elements from nine observations Sept. 19-29:
T = 1987 July 22.282 ET
W = 319.878 e = 0.61858
O = 352.787 1950.0 a = 3.02933 AU
i = 19.517 n = 0.186933
q = 1.15545 AU P = 5.27 years
1987 ET R.A. (1950) Decl. Delta r V
Oct. 22 0 25.28 +32 27.6 0.642 1.591 16.3
Nov. 1 0 17.05 +32 13.8 0.746 1.666 16.8
11 0 14.67 +31 40.7 0.865 1.743 17.3
1987 SJ3
Correction of the time of the Sept. 30 observation (IAUC
4467) by -1 hour means that this is a Hungaria-type object: T =
1987 July 18.41 ET, W = 315.21, O = 15.48, i = 20.80 (equinox
1950.0), q = 1.6756 AU, e = 0.0963, a = 1.8542 AU, n = 0.39037.
1987 ET R.A. (1950) Decl. Delta r V
Oct. 12 0 14.43 - 2 38.7 0.729 1.711 15.5
22 23 59.10 - 0 10.6
Nov. 1 23 48.65 + 2 16.1 0.842 1.728 16.2
11 23 43.47 + 4 38.0
1987 October 13 (4469) Brian G. Marsden
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