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IAUC 2734: Cyg X-3; 1974i; 1974h; 1974g

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IAUC number 

                                                  Circular No. 2734
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


CYGNUS X-3
     Dr. K. Osawa, Director of the Tokyo Astronomical Observatory,
reports that observers at the Kashima Branch of the Radio Research
Laboratories detected a flare-up of Cyg X-3 on Dec. 19d02h UT. On
Dec. 19d03h the flux density of the source at 4.21 GHz was 4.7 +/-
0.2 Jy.


PERIODIC COMET WIRTANEN (1974i)
     Dr. Elizabeth Roemer, University of Arizona, reports the
recovery of this comet on a single 90-min exposure with the Steward
Observatory's 229-cm reflector on Kitt Peak.  The comet's image was
fairly well condensed.  L. M. Vaughn assisted.  The indicated
correction to the prediction on IAUC 2697 is Delta-T = -0.07 day.

     1974 UT          R. A. (1950) Decl.      m2
     Dec. 20.51279   13 24.14    + 3 38.6    21.5


COMET BENNETT (1974h)
     Several negative observations have been reported of this
comet, among them the following: D. Herald, Canberra, made an
unsuccessful visual search with a 31-cm reflector during the total
lunar eclipse on Nov. 29 and concluded that m1 must have been
fainter than 12; V. M. Blanco, Cerro Tololo Interamerican Observatory,
informs us that the comet could not be detected on exposures
of up to 30 min with the Curtis Schmidt telescope on Dec. 5; E.
Roemer, Lunar and Planetary Laboratory, failed to record the comet
on a 20-min exposure with the 154-cm reflector on Dec. 16 and
concluded that, if stellar, the comet was fainter than m2 = 18.


COMET VAN DEN BERGH (1974g)
     Dr. Roemer provides the following precise positions, obtained
with the 154-cm reflector.  Measurer: Carolyn C. McCarthy.

     1974 UT             R. A. (1950) Decl.
     Dec. 16.19062     1 26 30.63   +25 50 34.0
          16.24167     1 26 30.60   +25 50 07.7


1974 December 24               (2734)              Brian G. Marsden

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