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IAUC 5146: 1990ah; 1990 SQ

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IAUC number 

                                                  Circular No. 5146
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


SUPERNOVA 1990ah IN UGC 249
     C. Pollas, Observatoire de la Cote d'Azur, reports his
discovery, on panchromatic film exposed on Dec. 7.77 UT, of a
supernova of mag 18 in UGC 249.  The supernova is located at R.A. =
0h23m34s.91, Decl. = +13 22'44".3 (equinox 1950.0), or 3".4 east
and 7".7 north of the galaxy's center.  There is a nearby star
(mag 17) at R.A. = 0h23m36s, Decl. = +13 22'.1.
     A. V. Filippenko and J. C. Shields, University of California
at Berkeley, report that a CCD spectrum (range 390-710 nm,
resolution 1.5 nm) obtained under poor conditions on Dec. 12 UT with
the Shane 3-m reflector at Lick Observatory shows that the object
is probably a type-II supernova not long past maximum brightness.
H-alpha has a P-Cyg profile, and broad Na D absorption is present.


1990 SQ
     Extension of ephemeris on IAUC 5137, from orbital elements
on MPC 17449:

     1990/91      R.A. (1950) Decl.     Delta      r       V
     Dec. 25    23 12.66    +48 26.9    0.455    1.142    13.2
          30    23 36.42    +51 05.2
     Jan.  4     0 03.49    +53 23.5    0.481    1.174    13.3
           9     0 33.87    +55 16.8
          14     1 07.20    +56 40.3    0.515    1.214    13.4
          19     1 42.69    +57 30.5
          24     2 19.16    +57 45.5    0.558    1.260    13.6
          29     2 55.24    +57 26.3
     Feb.  3     3 29.71    +56 36.3    0.614    1.311    13.8
           8     4 01.76    +55 20.8
          13     4 31.02    +53 46.1    0.683    1.366    14.0
          18     4 57.47    +51 57.9
          23     5 21.30    +50 01.5    0.767    1.423    14.3
          28     5 42.80    +48 00.9
     Mar.  5     6 02.27    +45 59.1    0.865    1.483    14.6
          10     6 20.05    +43 58.2
          15     6 36.40    +41 59.6    0.977    1.543    14.9
          20     6 51.58    +40 04.3
          25     7 05.76    +38 12.7    1.100    1.604    15.3


1990 December 14               (5146)             Daniel W. E. Green

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