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IAUC 5334: SNe; N Sct 1991; 1991 OA

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IAUC number 

                                                  Circular No. 5334
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


SUPERNOVAE
     R. H. McNaught, Anglo-Australian Observatory, reports his
discovery of a supernova, designated 1991ar, of mag about 17 on a J
plate taken by K. S. Russell with the U.K. Schmidt Telescope on Sept.
2.64 UT.  The supernova is situated in a knot on the edge of a spiral
arm of IC 49 and has coordinates R.A. = 0h41m22s.58, Decl. = +1
34'48".6 (equinox 1950.0, uncertainty 0".4 in each coordinate), or
8".5 east and 12".5 north of the nucleus.  No star appears in this
position on a U.K. Schmidt J plate taken on 1984 Nov. 14.  A nearby
star of mag about 16, situated on the edge of the galaxy, has end
figures 23s.93, 26".9.

     McNaught also provides precise positions for two earlier
supernovae that he accidentally rediscovered, at mag about 17 and 16,
respectively, on an R plate taken by Russell with the U.K.
Schmidt Telescope on Aug. 30.5 UT: SN 1991ag (cf. IAUC 5287), R.A. =
19h56m10s.43, Decl. = -55 30'17".4 (equinox 1950.0, uncertainty 0".3
in each coordinate), offset from the nucleus of IC 4919 by 2".7 west,
22".5 north; SN 1991al (cf. IAUC 5310), R.A. = 19h38m23s.32, Decl. =
-55 13'28".7 (equinox 1950.0, uncertainty 0".4 in each coordinate),
offset from the nucleus of an anonymous galaxy by 17".1 east, 7".2
south.


NOVA SCUTI 1991
     Visual magnitude estimates: Aug. 31.96 UT, 10.8 (G. Poyner,
Birmingham, England); Sept. 1.43, 11.4 (D. A. J. Seargent, The
Entrance, N.S.W., Australia); 1.87, 11.7 (B. H. Granslo, Fjellhamar,
Norway); 2.84, 12.0 (P. Schmeer, Bischmisheim, Germany).


1991 OA
     Continuation to the ephemeris on IAUC 5322:

     1991 ET      R.A. (1950) Decl.     Delta      r        V
     Sept. 1    21 31.98    - 4 42.4    0.383    1.381    16.8
          11    21 35.26    - 4 17.9
          21    21 40.56    - 4 03.9    0.589    1.535    18.3
     Oct.  1    21 47.74    - 3 50.2
          11    21 56.55    - 3 31.6    0.848    1.694    19.5


1991 September 3               (5334)              Brian G. Marsden

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