Central Bureau for Astronomical Telegrams
IAUC 4886: 1989y; AS 296
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Circular No. 4886
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
COMET 1989y
Eleanor F. Helin reports the discovery by Jeff Alu and
herself, using the Palomar 0.46-m Schmidt telescope, of another
comet. The object is slightly diffuse with a very faint tail toward
the west. B. Roman and K. Lawrence assisted with the observations.
The following positions were measured by Roman:
Very preliminary orbital elements from the above observations:
T = 1989 Oct. 5.476 ET Peri. = 189.230
e = 0.46114 Node = 198.772 1950.0
q = 1.68938 AU Incl. = 5.658
a = 3.13509 AU n = 0.177553 P = 5.55 years
1989 ET R.A. (1950) Decl. Delta r m1
Oct. 21 3 10.89 +13 40.6 0.732 1.695 16.1
26 3 10.03 +12 57.3
31 3 08.59 +12 13.2 0.722 1.705 16.1
Nov. 5 3 06.74 +11 30.0
10 3 04.70 +10 49.4 0.731 1.719 16.2
15 3 02.69 +10 12.8
20 3 00.88 + 9 41.5 0.762 1.738 16.3
25 2 59.44 + 9 16.4
30 2 58.53 + 8 58.2 0.812 1.760 16.5
AS 296
Visual magnitude estimates (cf. IAUC 4853): Sept. 17.86 UT,
10.2 (P. Schmeer, Bischmisheim, W. Germany); 27.42, 10.0 (P. F.
Williams, Heathcote, N.S.W); Oct. 3.88, 9.7 (A. Pereira, Cabo da
Roca, Portugal); 17.80, 10.6 (Schmeer); 21.78, 11.6 (Schmeer);
27.75, 12.4 (Schmeer).
1989 October 30 (4886) Daniel W. E. Green
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