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IAUC 2747: 1949 OA

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IAUC number 

                                                  Circular No. 2747
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


1949 OA
     Dr. P. Wild, Astronomical Institute, Berne, cables the following
precise positions of a fast-moving object discovered by him at
Zimmerwald (Long. = -7o27'58".24, Lat. = +46o52'40".32, h = 903 m):

     1975 UT             R. A. (1950) Decl.         mpg
     Feb.  6.97917     9 41 35.53   +32 11 18.5    14.0
           9.99931     9 35 57.50   +35 56 39.8    14.5
          10.93612     9 34 07.83   +37 04 18.7    14.5

     The object is within 4o of an unpublished prediction, by C. M.
Bardwell, Cincinnati Observatory, for the unusual minor planet 1949
OA, discovered by C. A. Wirtanen at the Lick Observatory in 1949
and not observed since.  The prediction has been adjusted by the
undersigned to fit the new observations, with the following result:

       T = 1975 Sept. 4.47 ET
   Peri. = 140.25                     e =   0.0618
   Node  = 130.18   1950.0            a =   1.3907 AU
   Incl. =  39.11                     n =   0.60095
       q =   1.3048 AU                P =   1.64 years

     1975 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Feb.  7     9 41.57    +32 13.1    0.473   1.444   14.4
          12     9 32.02    +38 19.7
          17     9 21.56    +43 47.2    0.502   1.437   14.8
          22     9 10.81    +48 25.6
          27     9 00.45    +52 13.0    0.561   1.430   15.2
     Mar.  4     8 51.14    +55 13.3
           9     8 43.48    +57 32.8    0.638   1.422   15.6
          14     8 37.93    +59 18.6
          19     8 34.76    +60 37.6    0.722   1.413   16.0
          24     8 34.06    +61 35.4
          29     8 35.77    +62 16.4    0.806   1.405   16.3
     Apr.  3     8 39.71    +62 43.7
           8     8 45.72    +62 59.3    0.887   1.396   16.5
          13     8 53.59    +63 04.7
          18     9 03.08    +63 00.9    0.960   1.387   16.7

      Mag. = 15.0 + 5 log Delta + 5 log r + 0.023 (phase angle)


1975 February 12               (2747)              Brian G. Marsden

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