Central Bureau for Astronomical Telegrams
IAUC 5018: 1990 KA; 1989d1
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Read IAUC 5019
Circular No. 5018
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
1990 KA
E. Helin reports her discovery at of a fast-moving asteroidal
object on Palomar 0.46-m Schmidt films taken by herself, B. Roman,
and K. Lawrence, as follows:
1990 UT R.A. (1950) Decl. Mag.
May 18.27396 15 08 52.65 +10 38 52.8 15.2
18.29809 15 08 52.98 +10 38 29.5
20.35382 15 09 49.43 +10 07 01.1 15.3
20.36528 15 09 49.81 +10 06 55.5
21.28559 15 10 17.95 + 9 51 24.0 15.0
21.41128 15 10 20.35 + 9 49 11.0
The following preliminary orbital elements, by B. G. Marsden,
Center for Astrophysics, are necessarily uncertain:
T = 1990 June 6.55 ET Peri. = 142.71
e = 0.3769 Node = 107.02 1950.0
q = 1.2296 AU Incl. = 6.86
a = 1.9736 AU n = 0.35549 P = 2.77 years
1990 ET R.A. (1950) Decl. Delta r V
May 9 15 05.23 +12 07.8 0.278 1.259 14.7
14 15 07.09 +11 30.5
19 15 09.20 +10 28.5 0.260 1.242 14.6
24 15 11.75 + 9 00.8
29 15 14.94 + 7 07.8 0.251 1.232 14.5
June 3 15 18.97 + 4 51.3
8 15 23.94 + 2 14.9 0.250 1.230 14.5
13 15 29.88 - 0 37.0
18 15 36.82 - 3 39.2 0.259 1.234 14.6
PERIODIC COMET SCHWASSMANN-WACHMANN 3 (1989d1)
Total visual magnitude estimates: May 4.32 UT, 8.5 (V. F. de
Assis Neto, Sao Francisco de Oliveira, Brazil, 10x70 binoculars);
7.39, 9.9 (G. Kronk, Troy, IL, 0.33-m reflector; 6' tail in p.a. 245
deg); 19.87, 10.4 (A. Pearce, Scarborough, W.A., 0.20-m reflector;
4' tail in p.a. 239 deg); 21.46, 10.4 (A. Hale, Las Cruces, NM,
0.41-m reflector).
1990 May 21 (5018) Daniel W. E. Green
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