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IAUC 3089: V711 Tau; 1975 YA

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                                                  Circular No. 3089
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     Telex: 921428
Telephone: (617) 864-5758


V711 TAURI
     A joint observational campaign on the system V711 Tau = HR
1099 (R.A. = 3h34m.2, Decl. = +0o26', equinox 1950.0) will be conducted at
radio, infrared, optical and ultraviolet frequencies during Oct. 6-18.
Since the ultraviolet observations will be made from the continuously
operating Copernicus satellite, it will be useful if the
other observations, particularly those in H-alpha, can be made from all
longitudes.  Observers interested in contributing to the infrared
and optical coverage can obtain additional information from E. J.
Weiler, Princeton University Observatory, Princeton, NJ 08540,
U.S.A. (telephone 301-982-2633 at Goddard Space Flight Center);
radio astronomers shauld contact F. N. Owen, National Radio Astronomy
Observatory, Charlottesville, VA 22901, U.S.A. (804-937-1271).


1975 YA
     The following orbital elements, by B. G. Marsden, are from 33
observations 1975 Dec. 27 to 1976 July 3:

       T = 1977 Aug. 3.1628 ET    Epoch = 1977  Aug. 5.0 ET
   Peri. =  61.6509                   e =   0.298214
   Node  =  93.7387   1950.0          a =   1.290069 AU
   Incl. =  64.0167                   n =   0.6726431
       q =   0.905353 AU              P =   1.465 years

     1977 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Aug. 15    10 42.17    +39 43.6    1.650   0.913   19.1
          20    11 13.17    +38 17.5
          25    11 43.37    +36 17.0    1.609   0.930   19.2
          30    12 12.22    +33 45.2
     Sept. 4    12 39.41    +30 46.9    1.595   0.957   19.3
           9    13 04.76    +27 27.9
          14    13 28.27    +23 54.7    1.613   0.991   19.4
          19    13 50.02    +20 13.3
          24    14 10.17    +16 29.2    1.660   1.030   19.5
          29    14 28.89    +12 46.8
     Oct.  4    14 46.39    + 9 09.6    1.733   1.073   19.6
           9    15 02.83    + 5 40.1
          14    15 18.40    + 2 20.0    1.823   1.119   19.7


1977 July 11                   (3089)              Brian G. Marsden

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