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IAUC 4055: 1985c; CH Cyg; PG 1115+080A

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IAUC number 

                                                  Circular No. 4055
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


PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1985c)
     R. H. McNaught, Siding Spring Observatory, telexes that D.
Seargent, The Entrance, N.S.W., has informed him of the probable
recovery of this comet in Western Australia visually (0.4-m
reflector) by M. Clark, A. Pearce and J. Athanasou, as follows:

          1985 UT           R.A. (1950.0) Decl.      m1

          Apr. 18.9         0 12        - 0.9        11
               20.885       0 22.8      + 0 12'      10

The object is diffuse with neither condensation nor tail.  Predicted
elements have been supplied by B. G. Marsden on MPC 8273 and
by S. Nakano on Nakano Note No. 432.


CH CYGNI
     A. R. Taylor, Kapteyn Laboratorium, University of Groningen;
and E. R. Seaquist, Department of Astronomy, Univeristy of Toronto,
telex: "We have discovered a radio outburst and jet from the
symbiotic star CH Cyg.  VLA observations over the past year yield
the following flux densities (in mJy) at 14.96 GHz: 1984 Apr. 6,
1.4; Nov. 8, 8.3; 1985 Jan. 22, 25.8; Apr. 10, 33.7.  A radio map
in 1984 Nov. showed two components with roughly equal flux density
separated by 0"18.  Two months later the source had evolved to a
collinear triple with total extent 0"4.  For a distance of 600 pc,
the expansion velocity >= 3000 km/s.  The total mass of ejected
material is estimated at a few microsuns.  Radio coordinates are R.A.
= 19h23m14s12, Decl. = +50deg08'30"7 (equinox 1950.0)."


PG 1115+080A
     R. Foy, D. Bonneau and A. Blazit, CERGA, telex: "We observed
the bright twin component of PG 1115+080 by speckle interferometry
with the 3.6-m Canada-France-Hawaii Telescope on 1984 May 28.  Both
components An (north) and As (south) were known to have about the
same brightness up until 1984 Mar. (Vanderriest and Wlerick,
private communication).  We find that the northern component had
faded, and that the magnitude difference had become 1 +/- 0.3.  The
mean image autocorrelation shows an elongated secondary peak,
indicating than An is almost resolved.  It is likely that An is
itself a twin object with F(AnQ,AnW) ~ 0"03 +/- 0"01, p.a. = 13 +/-
10 deg and magnitude difference m(AnQ)-m(AnW) = 0.0 +/- 0.5."


1985 April 25                  (4055)              Brian G. Marsden

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