Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4454: 1987 QA

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 4453 SEARCH Read IAUC 4455
IAUC number 

                                                  Circular No. 4454
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


1987 QA
     Further positions, including accurate measurements of those
on IAUC 4446, have been reported as follows:

   1987 UT            R.A. (1950) Decl.        Mag.   Observer
   Aug. 23.43958    1 22 12.76   +11 20 23.4   16.5   Mueller
        23.49167    1 22 19.48   +11 18 05.8            "
        26.47917    1 29 27.65   + 8 51 39.1            "
        26.49653    1 29 30.02   + 8 50 45.0            "
   Sept. 3.35833    1 50 49.25   + 0 01 08.2            "
         3.37917    1 50 52.91   - 0 00 33.6            "
         4.45833    1 54 10.2    - 1 32 45              "
         4.50000    1 54 17.5    - 1 36 22              "
        15.48397    2 35 46.73   -22 15 48.6   16     Gilmore
        15.50394    2 35 51.88   -22 18 25.2            "
        19.54105    2 56 15.14   -31 38 48.7   16       "

J. Mueller (Palomar).  Measurers L. Fischer and S. Singer-Brewster.
   Sept. 4 semiaccurate measurements by A. Maury.
A. C. Gilmore (Mount John Observatory).  Measurer P. M. Kilmartin.
   Sept. 15: 0.61-m reflector, three reference stars, first
   image trailed.  Sept. 19: 0.25-m astrograph.

     Improved orbital elements from the above observations:

         T = 1987 Nov. 30.3515 ET
         W = 278.8101                    e =   0.468787
         O = 168.7131   1950.0           a =   1.648335 AU
         i =  40.7255                    n =   0.4657318
         q =   0.875617 AU               P =   2.116 years

     1987 ET      R.A. (1950) Decl.     Delta      r       V
     Sept.22     3 10.58    -37 23.4    0.308    1.195    15.4
          27     3 45.45    -48 19.7
     Oct.  2     4 29.62    -57 16.9    0.338    1.126    15.8
           7     5 23.94    -63 40.7
          12     6 25.79    -67 33.5    0.406    1.060    16.4
          17     7 28.42    -69 20.6
          22     8 24.68    -69 38.5    0.487    1.000    16.9
          27     9 11.29    -69 01.2
     Nov.  1     9 48.74    -67 52.4    0.565    0.948    17.1
           6    10 19.03    -66 26.1
          11    10 44.19    -64 49.4    0.634    0.908    17.3


1987 September 24              (4454)              Brian G. Marsden

Read IAUC 4453 SEARCH Read IAUC 4455

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

Valid HTML 4.01!