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IAUC 3546: Prob. N IN Cyg; UX UMa; 1980q; SU Tau

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IAUC number

                                                  Circular No. 3546
Central Bureau for Astronomical Telegrams
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

     H. Kosai, Tokyo Astronomical Observatory, telexes that Minoru
Honda, Kurashiki, has discovered a probable nova as follows:

     1980 UT          R. A. (1950) Decl.      mv
     Nov. 29.41841   21 40.7     +31 15       10

The object is slowly increasing in brightness.

     R. J. Panek, A. V. Holm and F. H. Schiffer III, Computer
Sciences Corporation and Goddard Space Flight Center, report: "IUE
spectra of UX UMa on Nov. 25 show that the ultraviolet line emission
reported on IAUC 3538 is still present but has weakened considerably
since Oct. 15.  Si IV is no longer detectable in the out-of-eclipse
spectra.  Optical spectrophotometry is urged."

      D. Bockelee-Morvan, J. Crovisier, E. Gerard and I. Kazes,
Meudon Observatory and Nancay Radio Observatory, communicate: "The
main lines of OH at 1667 and 1665 MHz were detected in absorption
in comet 1980q on Nov. 16, 27 and 28 with the Nancay radio telescope.
The 1667-MHz antenna temperature was -30 +/- 13 and -18 +/- 6
mK on Nov. 16 and on Nov. 27-28, respectively.  The corresponding
OH-parent production rates (reduced to 1 AU assuming an inverse-square-law
dependence) are (9 +/- 3) x 10**28 and (15 +/- 4) x 10**28
molecules per second."

     Total visual magnitude estimates: Nov. 10.79 UT, 9.1 (G. S.
Keitch, Wrington, Eng., 0.3-m reflector); 13.02, 10.5 (J. DeYoung,
Palmyra, VA, 0.15-m reflector); 30.93, 9.5 (C. S. Morris, Harvard,
MA, 0.25-m reflector).

     The following visual magnitude estimates of this R CrB-type
variable (cf. IAUC 3524) have been reported by C. E. Spratt, Victoria,
B.C.: Nov. 1.2 UT, 11.7; 8.2, 11.1; 10.3, 11.2; 14.3, 10.9.

1980 December 3                (3546)              Brian G. Marsden

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