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IAUC 4137: 1985p; CH Cyg; MU Cep

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IAUC number 

                                                  Circular No. 4137
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 CIFFREO (1985p)
     Orbital elements from 21 observations (Nov. 8-15), by the
undersigned, indicate that this is a short-period comet:

         T = 1985 Oct. 27.9993 ET
     Peri. = 356.7487                   e =   0.563914
     Node  =  53.2724   1950.0          a =   3.937155 AU
     Incl. =  13.4143                   n =   0.1261625
         q =   1.716937 AU              P =   7.81 years

     1985/6 ET   R.A. (1950.0) Decl.      p        r       m1

     Nov. 11     4 31.62    +24 13.4    0.764    1.722    11.8
          21     4 25.61    +26 57.4
     Dec.  1     4 17.92    +29 26.5    0.767    1.749    11.9
          11     4 10.60    +31 30.8
          21     4 05.69    +33 07.4    0.858    1.796    12.2
          31     4 04.51    +34 19.5
     Jan. 10     4 07.49    +35 12.5    1.026    1.862    12.8
          20     4 14.53    +35 51.7
          30     4 25.11    +36 20.7    1.252    1.942    13.4


CH CYGNI
     J. D. Fernie, David Dunlap Observatory, writes: "Following
recent interest in this symbiotic star (e.g., cf. IAUC 4055), I have
monitored CH Cyg sporadically with uvby-beta-RIKC filters since last
May.  While it has remained relatively quiescent at y ~ 7.5 and I ~
3.6, fairly substantial activity has appeared at shorter wavelengths
and in H-beta since late Sept. and early Oct.  The flux in the
u band has increased by > 0.5 mag, b-y has diminished from 1.6 to
1.4, and the beta index has decreased from 2.4 to 2.1.  It seems that
the hot component may be at an early stage of outburst and that
close surveillance would be worthwhile."


MU CEPHEI
     J. F. le Borgne, Pic du Midi Observatory, communicates that
recent U and B polarimetric observations with the 2-m telescope
resulted in the detection of a circumstellar dust envelope around
the luminous red supergiant MU Cep, the envelope being 10"-15" from the star.


1985 November 18               (4137)            Daniel W. E. Green

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