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IAUC 4930: 1989f1; 1989U; 1989a1

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IAUC number 

                                              Circular No. 4930
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 McKENZIE-RUSSELL (1989f1)
     R. H. McNaught reports the discovery by Patricia McKenzie
of a new comet found on a plate taken by Kenneth S. Russell at
the Anglo-Australian Observatory.  The following positions are
available:

     1989 UT             R.A. (1950) Decl.        m1    Observer
     Dec. 21.51635    5 01 32.77   + 2 47 36.1   14     Russell
          21.56496    5 01 12.30   + 2 46 43.7            "
          24.49892    4 42 24.31   + 1 59 08.1   13     McNaught
          24.64931    4 41 28.6    + 1 56 43     13     Seki

K. S. Russell (Siding Spring).  1.2-m Schmidt telescope.  Beginning
  and end positions of trail.  Comet strongly condensed with 15'
  tail in p.a. 50 deg.
R. H. McNaught (Siding Spring).  Uppsala Schmidt telescope.
  Comet strongly condensed, 5' tail in p.a. 50 deg.
T. Seki (Geisei).  Comet diffuse with central condensation, 30" tail
  in p.a. 45 deg.


SUPERNOVA 1989U IN UGC 5295
      R. Lopez, University of Barcelona; and A. Riera and J. Cepa,
Instituto de Astrofisica de Canarias, write:  "Low-resolution spectra
obtained on Dec. 21 with the Faint Object Spectrograph (range 480-970
nm) on the 4.2-m William Herschel Telescope (La Palma) confirm
that SN 1989U (cf. IAUC 4927) is a type-II supernova, as
inferred from the characteristic H-alpha (656.3 nm) P-Cyg profile.
This feature shows a broad emission and a visible absorption, from
which can be inferred a velocity of about 7000 km/s.  The Fe II
blend (620 nm) and Na I (587.2 nm) are barely detected.  The supernova
is located at R.A. = 9h49m45s.7, Decl. = +43 05'51".8 (equinox 1950.0).
A spectrum of the nucleus of UGC 5295 was also taken, showing H-alpha
emission from which we estimate a velocity of about 5300 +/- 900 km/s."


COMET AARSETH-BREWINGTON (1989a1)
     Total visual magnitude estimates (cf. IAUC 4923):  Dec. 19.46
UT, 3.6 (J. E. Bortle, Stormville, NY, 10x50 binoculars; 2.2-deg
tail in p.a. 322 deg); 20.53, 3.7 (A. Hale, Las Cruces, NM, 10x50
binoculars; 3-deg tail in p.a. 309 deg); 22.55, 3.2 (R. Keen, Mt.
Thorodin, CO, naked eye); 23.57, 3.4 (C. Morris, near Mt. Wilson,
CA, 20x80 binoculars; 2.25-deg tail in p.a. 300 deg).


1989 December 26               (4930)             Daniel W. E. Green

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