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IAUC 5421: 1991h1; UV Per

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                                                  Circular No. 5421
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


COMET MUELLER (1991h1)
     Further precise positions have been reported as follows:

     1992 UT             R.A. (2000) Decl.       Observer
     Jan.  1.43038    8 53 23.87   +48 00 34.2   Shoemaker
           1.46605    8 53 14.48   +48 01 15.8     "
           2.23370    8 49 41.85   +48 17 15.5   McCrosky
           2.23774    8 49 40.68   +48 17 20.3     "

E. M. Shoemaker, C. S. Shoemaker and D. H. Levy (Palomar).  0.46-m
   Schmidt.  Measurer J. Mueller.
R. E. McCrosky and C.-Y. Shao (Oak Ridge).  1.5-m reflector + CCD.

     Parabolic orbital elements from the eight available observations:

     T = 1992 Mar. 21.196 TT          Peri. = 307.011
                                      Node  = 288.795   2000.0
     q = 0.19871 AU                   Incl. =  95.524

1991/92     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Dec. 30     9 03.40    +47 10.2    1.029    1.901  141.8   18.6     15.9
Jan.  4     8 40.77    +48 53.9    0.913    1.817  146.8   17.3     15.4
      9     8 08.78    +50 28.8    0.808    1.731  150.1   16.5     14.9
     14     7 25.04    +51 24.4    0.716    1.643  149.9   17.5     14.4
     19     6 29.64    +50 49.9    0.642    1.553  144.7   21.5     13.9
     24     5 28.12    +47 50.4    0.589    1.461  134.8   28.6     13.5
     29     4 30.11    +42 09.1    0.561    1.366  121.7   37.8     13.1
Feb.  3     3 42.41    +34 33.4    0.558    1.268  107.2   47.9     12.8
      8     3 05.92    +26 21.9    0.578    1.167   92.8   57.6     12.5


UV PERSEI
     Various reports, initially one from M. Gainsford, Burbage, Leics.,
England (communicated by G. M. Hurst), show that this object (cf. IAUC 4880)
is in outburst.  Visual magnitude estimates: 1991 Dec. 15.82 UT, [13.9
(P. Schmeer, Bischmisheim, Germany); 22.80, 13.0 (Gainsford); 22.82, 12.3
(G. Poyner, Birmingham, England); 23.82, 12.8 (G. M. Hurst, Basingstoke,
England); 24.73, 12.3 (M. Verdenet, Bourbon-Lancy, France); 25.86, 12.2
(Verdenet); 27.96, 12.6 (Schmeer); 28.85, 12.6 (Schmeer).


1992 January 2                 (5421)              Brian G. Marsden

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