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IAUC 3630: 1981 QA

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IAUC number 

                                                  Circular No. 3630
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 617-864-5758


1981 QA
The following precise positions have been reported:

     1981 UT             R. A. (1950) Decl.       Mag.   Observer
     Aug. 24.06192    20 20 20.20   + 2 44 19.3          Schwartz
          24.17383    20 20 40.17   + 2 40 45.2            "
          25.55279    20 25 13.38   + 1 53 25.7   13.0   Jekabsons
          26.06258    20 26 55.09   + 1 34 37.7          Schwartz
          26.27292    20 27 36.54   + 1 27 10.0   14.5   Bowell
          26.28958    20 27 39.40   + 1 26 39.6            "
          27.12214    20 30 29.21   + 0 56 57.3          Schwartz

G. Schwartz (Oak Ridge Observatory).  0.41-m astrograph on Aug. 24
   and 26, 1.5-m reflector on Aug. 27.  Measurers: C.-Y. Shao and
   D. W. E. Green.
P. Jekabsons (Perth Observatory).  Communicated by N. P. Candy.
F. Bowell (Lowell Observatory, Anderson Mesa Station).

     C. M. Bardwell, Center for Astrophysics, provides the following
orbital elements, based upon 6 observations (the Aug. 24 observations
were averaged and used as one):

       T = 1981 Aug. 22.883 ET
   Peri. = 153.896                    e =   0.48918
   Node  = 171.524   1950.0           a =   2.34896 AU
   Incl. =  8.955                     n =   0.273773
       q =   1.19991 AU               P =   3.60 years

     1981 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Aug. 24    20 20.12    + 2 47.0    0.214   1.200   14.6
          26    20 26.70    + 1 37.3
          28    20 33.49    + 0 25.9    0.214   1.201   14.6
          30    20 40.47    - 0 46.4
     Sept. 1    20 47.61    - 1 59.1    0.217   1.204   14.6
           3    20 54.87    - 3 11.3
           5    21 02.24    - 4 22.4    0.221   1.209   14.7
           7    21 09.66    - 5 31.8
           9    21 17.12    - 6 38.7    0.229   1.214   14.7
          11    21 24.57    - 7 42.8
          13    21 31.99    - 8 43.6    0.238   1.222   14.8
          15    21 39.34    - 9 40.6

      Mag. = 17.0 + 5 log Delta + 5 log r + 0.023(phase angle)


1981 August 28                 (3630)              Daniel W. E. Green

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