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IAUC 5089: BC UMa; UX Ant, UW Cen, AND RZ Nor; 1989e1

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                                                  Circular No. 5089
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


BC URSAE MAJORIS
     This dwarf nova has undergone its first confirmed outburst
since 1982 May, as indicated by the following visual magnitude
estimates: Sept. 9.02 UT, 10.9 (G. Dyck, N. Dartmouth, MA); 9.82,
11.5: (P. Schmeer, Bischmisheim, West Germany); 9.90, 11.3: (G.
Poyner, Birmingham, England; communicated by G. M. Hurst,
Basingstoke). J. A. Mattei, American Association of Variable Star
Observers, notes that high-speed photometry has not yet been
performed on this variable while in outburst.


UX ANTLIAE, UW CENTAURI, AND RZ NORMAE
     L. A. Milone, Observatorio Astronomico, Universidad Nacional
de Cordoba, reports the following magnitude estimates of R CrB-
type variables:  UX Ant, July 24.9 UT, B = 16.2; July 26.9, B
[16.5.  UW Cen, June 12.0, B [16.5; June 21.0, V [16.5; July 13.0,
V [16.5; July 17.0, V [16.5; July 24.1, B [16.5.  RZ Nor, June
17.1, B [16.5; July 13.1, V [16.5; July 24.1, B [16.5.  The B
magnitudes are from photographs with the Cordoba "Carte du Ciel"
0.33-m astrograph; the visual estimates were made with the Bosque
Alegre Field Station 1.5-m reflector.


COMET SKORICHENKO-GEORGE (1989e1)
     Ephemeris from orbital elements on MPC 16378:

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Sept.16     8 42.65    - 6 04.9    3.216    2.576    12.6
          26     8 52.35    - 9 28.5
     Oct.  6     9 00.73    -12 54.6    3.206    2.767    13.0
          16     9 07.68    -16 22.7
          26     9 13.02    -19 51.5    3.176    2.961    13.2
     Nov.  5     9 16.55    -23 19.4
          15     9 18.07    -26 43.8    3.141    3.155    13.5
          25     9 17.34    -30 01.2
     Dec.  5     9 14.19    -33 07.1    3.120    3.349    13.7
          15     9 08.50    -35 56.2
          25     9 00.35    -38 22.6    3.136    3.543    14.0


1990 September 10              (5089)             Daniel W. E. Green

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