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IAUC 4770: (2060); 1989 FB

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                                                  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

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