Central Bureau for Astronomical Telegrams
IAUC 4770: (2060); 1989 FB
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Read IAUC 4771
Circular No. 4770
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
(2060) CHIRON
K. J. Meech, University of Hawaii; and M. J. S. Belton, Kitt
Peak National Observatory, report that (2060) Chiron has a coma.
Observations made using a CCD at the prime focus of the KPNO 4-m
telescope on Apr. 10 UT in nearly photometric conditions showed
the feature, which was of very low surface brightness, extending
mostly to the southeast for about 5". The seeing was such that
the FWHM image of Chiron had a diameter of 0".9, and the very
approximate Mould r mag was 16.4. The coma had the same general
appearance on Apr. 11 in slightly poorer seeing.
1989 FB
Orbital elements from MPC 14479:
T = 1989 Sept.16.626 ET Peri. = 333.719
e = 0.25780 Node = 23.345 1950.0
q = 0.77470 AU Incl. = 14.693
a = 1.04379 AU n = 0.924242 P = 1.07 years
1989 ET R.A. (1950) Decl. Delta r V
Apr. 12 12 37.99 + 2 03.0 0.287 1.282 15.4
14 12 29.40 + 1 30.2
16 12 20.94 + 0 56.0 0.287 1.276 15.6
18 12 12.68 + 0 20.5
20 12 04.69 - 0 15.9 0.290 1.268 15.8
22 11 57.01 - 0 53.1
24 11 49.71 - 1 30.8 0.296 1.260 15.9
26 11 42.81 - 2 08.7
28 11 36.34 - 2 46.7 0.305 1.251 16.1
30 11 30.33 - 3 24.6
May 2 11 24.77 - 4 02.4 0.315 1.241 16.3
4 11 19.68 - 4 40.0
6 11 15.04 - 5 17.4 0.327 1.231 16.5
8 11 10.85 - 5 54.4
10 11 07.10 - 6 31.2 0.340 1.220 16.6
12 11 03.76 - 7 07.7
14 11 00.81 - 7 44.0 0.354 1.209 16.8
1989 April 11 (4770) Daniel W. E. Green
Read IAUC 4771
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