Central Bureau for Astronomical Telegrams
IAUC 4709: 1989c; 1988 XB
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Read IAUC 4710
Circular No. 4709
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 BRADFIELD (1989c)
Further precise positions, obtained by D. Herald at Kambah (near
Canberra) in poor seeing:
1989 UT R.A. (1950) Decl.
Jan. 9.45065 21 41 38.89 -54 52 02.7
9.45683 21 41 43.02 -54 51 49.4
9.46013 21 41 45.54 -54 51 44.1
The following parabolic orbital elements have been determined by
Herald from his eight observations (maximum residual 4"):
T = 1988 Dec. 5.69 ET Peri. = 194.89
Node = 26.46 1950.0
q = 0.4152 AU Incl. = 83.46
1989 ET R.A. (1950) Decl. Delta r m1
Jan. 6 21 03.18 -56 35.0 1.342 0.868 11.0
8 21 26.26 -55 40.0
10 21 47.19 -54 32.5 1.401 0.943 11.5
12 22 06.02 -53 16.0
14 22 22.89 -51 53.2 1.470 1.017 11.9
16 22 37.99 -50 26.6
18 22 51.51 -48 58.1 1.546 1.091 12.3
20 23 03.66 -47 28.9
22 23 14.62 -46 00.2 1.627 1.164 12.7
24 23 24.55 -44 32.8
26 23 33.59 -43 07.1 1.714 1.236 13.1
28 23 41.86 -41 43.7
30 23 49.46 -40 22.6 1.803 1.307 13.4
1988 XB
Continuation to the ephemeris on IAUC 4693:
1989 ET R.A. (1950) Decl. Delta r V
Jan. 14 5 42.82 +28 42.6 0.429 1.378 17.7
24 5 41.67 +28 27.3
Feb. 3 5 45.92 +28 11.7 0.661 1.516 19.1
13 5 54.06 +27 56.2
23 6 05.03 +27 39.9 0.932 1.641 20.1
1989 January 9 (4709) Brian G. Marsden
Read IAUC 4710
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