Central Bureau for Astronomical Telegrams
IAUC 4754: 1987 XXXVI; 1989f; 1989 DA
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Read IAUC 4755
Circular No. 4754
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 PARKER-HARTLEY (1987 XXXVI)
With reference to IAUC 4752, P. Jensen, Brorfelde, reports that
further inspection of his 1986 IIa-O plates show the comet (= 1986 TF)
images are slightly diffuse compared to the images of other minor
planets on the same plates; the comet shows no sign of central
condensation or tail.
COMET SHOEMAKER (1989f)
Parabolic orbital elements from MPC 14322:
T = 1988 Nov. 2.0064 ET Peri. = 18.7312
Node = 73.6292 1950.0
q = 2.204953 AU Incl. = 25.4905
1989 ET R.A. (1950) Decl. Delta r m1
Mar. 15 8 54.30 +50 44.3 2.025 2.674 17.3
25 8 59.48 +49 23.4
Apr. 4 9 06.82 +47 50.3 2.332 2.804 17.8
14 9 15.89 +46 08.7
24 9 26.27 +44 21.4 2.673 2.942 18.3
May 4 9 37.60 +42 30.4
14 9 49.61 +40 37.2 3.037 3.087 18.8
24 10 02.05 +38 42.9
June 3 10 14.74 +36 48.5 3.408 3.238 19.3
1989 DA
Ephemeris extension to IAUC 4751:
1989 ET R.A. (1950) Decl. Delta r V
Mar. 15 11 01.22 + 1 22.3 0.108 1.101 15.4
20 11 15.14 - 4 08.1
25 11 24.87 - 7 38.9 0.166 1.159 16.5
30 11 32.25 - 9 57.4
Apr. 4 11 38.30 -11 30.1 0.234 1.224 17.5
9 11 43.66 -12 33.4
14 11 48.72 -13 17.6 0.312 1.294 18.4
19 11 53.70 -13 49.2
24 11 58.72 -14 12.8 0.401 1.366 19.1
1989 March 9 (4754) Daniel W. E. Green
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