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IAUC 3538: 1980r; UX UMa

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IAUC number 

                                                  Circular No. 3538
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 617-864-5758


PERIODIC COMET WEST-KOHOUTEK-IKEMURA (1980r)
     H.-E. Schuster, European Southern Observatory, reports the
recovery of this comet as follows:

     1980 UT          R. A. (1950) Decl.        m1
     Nov. 12.06181   23 05.03    -46 27.5     18-19

The object is essentially stellar but shows some diffuseness.  The
indicated correction to the prediction by S. W. Milbourn (B.A.A.
Hdbk. 1980; MPC 5326) is Delta-T = -1.37 day.  A corrected ephemeris is:

     1980/81 ET  R. A. (1950) Decl.     Delta     r      m2
     Nov. 17    23 06.88    -45 03.0    1.746   2.049   19.3
          27    23 13.29    -41 54.9
     Dec.  7    23 22.79    -38 27.5    1.795   1.918   19.1
          17    23 34.88    -34 42.9
          27    23 49.08    -30 42.8    1.838   1.791   18.9
     Jan.  6     0 05.03    -26 28.2
          16     0 22.50    -22 00.3    1.873   1.674   18.6
          26     0 41.26    -17 20.6
     Feb.  5     1 01.23    -12 31.0    1.905   1.674   18.4
          15     1 22.36    - 7 34.0
          25     1 44.64    - 2 32.9    1.940   1.570   18.2
     Mar.  7     2 08.14    + 2 28.6
          17     2 32.95    + 7 25.9    1.986   1.428   18.0
          27     2 59.17    +12 14.1
     Apr.  6     3 26.95    +16 47.8    2.048   1.402   18.0
          16     3 56.40    +21 01.6
          26     4 27.55    +24 49.9    2.128   1.410   18.1


UX URSAE MAJORIS
     A. V. Holm, R. J. Panek and F. H. Schiffer III, Computer
Sciences Corporation and Goddard Space Flight Center, write: "IUE
spectra show that the novalike variable UX UMa is a spectacular
ultraviolet spectrum variable.  Whereas no line emission was visible in
1980 Feb., intense line emission of C IV, Si IV and N V appears on
Oct. 15, with a C IV equivalent width of 4.0 nm.  The visual
magnitude was unchanged within 0.3 mag.  Since related objects do not
show strong line emission, this is likely a transient phase."


1980 November 13               (3538)              Brian G. Marsden

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