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IAUC 3337: RS CVn; 1979 BA

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IAUC number 

                                                  Circular No. 3337
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


RS CANUM VENATICORUM
     D. M. Gibson and R. T. Newell, New Mexico Tech, report that RS
CVn was detected with the Very Large Array on Feb. 6d06h55m UT.
The observations were made at 4885 MHz using a subarray of four
antennae and an integration time of 5 min.  A point source located
within 1" of the optical position was detected at the level of 7.2
+/- 1.6 mJy.  At the distance of RS CVn this corresponds to a luminosity
of 1.7 x 10**17 erg s**-1 Hz**-1, comparable with large outbursts
seen previously in other RS CVn stars.  This observation, when
combined with other attempts to detect this object, indicates that RS
CVn exhibits flaring statistics similar to other members of the
class (cf. Owen and Gibson 1978, Astron. J. 83, 1488).


1979 BA
     H. L. Giclas, Lowell Observatory, provides the following
precise positions, measured by M. L. Kantz:

     1979 UT             R. A. (1950) Decl.
     Feb. 28.21736    10 21 29.67   +34 28 48.6
     Mar.  4.30208    10 15 45.95   +37 17 22.6

     Improved orbital elements by C. M. Bardwell:

       T = 1978 Sept. 26.555 ET
   Peri. = 290.507                    e =   0.20145
   Node  = 142.972   1950.0           a =   1.84316 AU
   Incl. =  46.695                    n =   0.393876
       q =   1.47186 AU               P =   2.50 years

     1979 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Mar. 18     9 59.98    +44 02.7
          28     9 53.67    +46 48.4    1.072   1.800   18.1
     Apr.  7     9 52.55    +48 16.2
          17     9 56.27    +48 49.8    1.333   1.851   18.7
          27    10 04.04    +48 45.0
     May   7    10 15.05    +48 11.9    1.596   1.901   19.1
          17    10 28.49    +47 17.5
          27    10 43.73    +46 05.8    1.843   1.949   19.5
     June  6    11 00.29    +44 39.9
          16    11 17.78    +43 02.0    2.065   1.994   19.7


1979 March 16                  (3337)              Brian G. Marsden

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