Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4121: 1985n

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 4120 SEARCH Read IAUC 4122
IAUC number 

                                                  Circular No. 4121
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


PERIODIC COMET BOETHIN (1985n)
     This comet has been recovered by A. C. Gilmore and P. M.
Kilmartin on exposures with the 0.25-m astrograph at Mount John
University Observatory:

      1985 UT             R.A.   (1950.0)   Decl.       m1

      Oct. 11.39899     19 00 21.27     -28 55 29.0     15
           11.45174     19 00 25.50     -28 55 12.3

The object is diffuse and condensed, and the indicated correction
to the predictions (MPC 8273; Nakano Note No. 456) is Delta-T = -3.5
days.  The following improved elements, by the undersigned, are
from a new orbit solution linking the 1975 and 1985 observations:

          T = 1986 Jan. 16.452 ET    Epoch = 1986 Jan. 10.0 ET
      Peri. =  11.649                    e =   0.77772
      Node  =  25.812   1950.0           a =   5.01336 AU
      Incl. =   5.751                    n =   0.087803
          q =   1.11437 AU               P =  11.23 years

     1985/86 ET  R.A. (1950.0) Decl.      p        r       m1

     Oct.  2    18 49.66    -29 43.3    1.463    1.809    15.7
          12    19 01.16    -28 52.3
          22    19 16.39    -27 51.8    1.488    1.623    15.0
     Nov.  1    19 35.04    -26 38.1
          11    19 56.84    -25 06.9    1.483    1.448    14.3
          21    20 21.57    -23 13.2
     Dec.  1    20 48.95    -20 52.2    1.447    1.293    13.5
          11    21 18.75    -17 59.7
          21    21 50.77    -14 32.5    1.390    1.177    12.8
          31    22 24.80    -10 30.3
     Jan. 10    23 00.70    - 5 55.5    1.337    1.118    12.4
          20    23 38.34    - 0 55.3
          30     0 17.56    + 4 18.2    1.322    1.131    12.4
     Feb.  9     0 58.17    + 9 29.1
          19     1 39.85    +14 20.1    1.379    1.212    13.0
     Mar.  1     2 22.03    +18 35.5
          11     3 04.04    +22 04.7    1.524    1.344    13.8
          21     3 45.16    +24 43.4
          31     4 24.66    +26 33.0    1.748    1.508    14.9
     Apr. 10     5 02.07    +27 38.6
          20     5 37.10    +28 07.2    2.032    1.688    16.0


1985 October 15                (4121)              Brian G. Marsden

Read IAUC 4120 SEARCH Read IAUC 4122

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!