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IAUC 4056: 1981 VA; HD 193793 = WR 140

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                                                  Circular No. 4056
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


1981 VA
     P. M. Kilmartin, Mount John University Observatory, telexes
that this Apollo-type object has been recovered by A. C. Gilmore
and herself, close to the prediction on MPC 6702 and 9361:

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

      Apr. 23.34911     10 06 57.03     -33 52 04.9     18
           23.41485     10 06 47.19     -33 49 58.0

     The following improved orbital elements are from a new
computation by the undersigned linking the 1981 and 1985 observations:

         T = 1985 July 11.8015 ET    Epoch = 1985 June 24.0 ET
     Peri. =  59.4228                    e =   0.744538
     Node  = 245.9976   1950.0           a =   2.458359 AU
     Incl. =  22.0242                    n =   0.2557032
         q =   0.628018 AU               P =   3.854 years

     1985 ET     R.A. (1950.0) Decl.      p        r      Mag.

     Apr. 15    10 28.65    -37 43.0    0.660    1.516    18.7
          20    10 15.33    -35 33.8
          25    10 03.02    -32 57.7    0.586    1.401    18.4
          30     9 51.95    -29 56.6
     May   5     9 42.22    -26 32.5    0.525    1.283    18.2
          10     9 33.76    -22 46.8
          15     9 26.40    -18 39.7    0.473    1.161    18.1
          20     9 19.87    -14 09.7
          25     9 13.73    - 9 13.3    0.425    1.039    17.9
          30     9 07.36    - 3 44.6
     June  4     8 59.90    + 2 24.7    0.382    0.919    17.9
           9     8 50.20    + 9 22.1
          14     8 36.79    +17 07.9    0.351    0.805    18.0
          19     8 17.92    +25 24.4
          24     7 52.16    +33 25.5    0.356    0.709    18.3


HD 193793 = WR 140
     P. M. Williams and M. G. Smith, U.K. Infrared Telescope,
communicate that infrared photometry of the Wolf-Rayet star HD
193793 on Apr. 23 shows that the object has again formed a
circumstellar dust shell, some 7-8 years since it last did so.


1985 April 25                  (4056)              Brian G. Marsden

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