Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3330: 1979a; YY Her

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 3329 SEARCH Read IAUC 3331
IAUC number 

                                                  Circular No. 3330
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


COMET KOWAL (1979a)
     The following precise positions, by T. Seki, Kochi Observatory,
Geisei Station, are from Yamamoto Circ. No. 1909:

     1979 UT             R. A. (1950) Decl.         m1
     Feb.  1.48368     3 11 56.24   + 9 16 28.0    16
           1.49757     3 11 58.67   + 9 16 25.2

     New parabolic and elliptical orbital elements have been
determined by the undersigned as shown below.  The elliptical elements
seem somewhat more probable (although e is very uncertain) and are
used for the Ephemeris.

       T = 1979 Jan. 17.570        1979 Jan. 16.088 ET
   Peri. = 192.385                 191.114
   Node  = 243.019                 245.976        1950.0
   Incl. =  16.553                  15.955
       q =   1.65799                 1.55587 AU
       e =   1.0                     0.67214

     1979 ET     R. A. (1950) Decl.     Delta     r      m1
     Feb. 16     3 49.91    + 9 16.3    1.234   1.594   17.0
          26     4 16.61    + 9 24.5
     Mar.  8     4 43.46    + 9 34.1    1.428   1.657   17.5
          18     5 10.21    + 9 41.0
          28     5 36.65    + 9 42.4    1.651   1.745   18.0


YY HERCULIS
     P. C. Gregory, Physics Department, University of British Columbia;
and F. R. Seaquist, Astronomy Department, University of Toronto,
report that their observations of YY Her (cf. IAUC 3321) in
1976 Apr. with the National Radio Astronomy Observatory's three-element
interferometer gave a 3-sigma upper limit of 5 mJy at both 2695
and 8085 MHz.  One weak source having a flux density of 11 +/- 4 mJy
at 8085 MHz and <~ 12 mJy at 2695 MHz was found at the edge of the
6' field, and it is suggested that this source corresponds to the
one reported on IAUC 3321.  Its coordinates are R.A. = 18h12m36s.34 +/-
0s.15, Decl. = +20o57'12".5 +/- 2" (equinox 1950.0).  No optical
counterpart was found in a search of the Palomar Sky Survey prints.


1979 February 20               (3330)              Brian G. Marsden

Read IAUC 3329 SEARCH Read IAUC 3331

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!