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IAUC 5147: 1990ai; 1990 XJ

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IAUC number 

                                                  Circular No. 5147
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 1990ai IN ANONYMOUS GALAXY
     C. Pollas, Observatoire de la Cote d'Azur, reports his discovery
on a film exposed Nov. 26.08 UT of a supernova (mag about 19.5)
located at R.A. = 7h17m11s.29, Decl. =  +21 59'57".3 (equinox
1950.0).  Two nearby galaxies are host candidates, one more compact
and less diffuse than the other; there are many faint, starlike
galaxies in this area.  The galaxy positions are R.A. = 7h17m11s.15,
Decl. = +22 00'01".2; R.A. = 7h17m11s.43, Decl. = +21 59'54".2.  A
nearby star is located at R.A. = 7h17m12s.76, Decl. = +21 59'15".2.
     A. V. Filippenko and J. C. Shields, University of California
at Berkeley; and R. G. Eastman and E. Regos, University of California
at Santa Cruz, report that a CCD spectrum (range 390-710 nm,
resolution 1.5 nm) obtained on Dec. 17 UT with the Shane 3-m
reflector at Lick Observatory shows that the object is probably a
type-Ib (or Ic) supernova not long past maximum brightness.


1990 XJ
     E. Helin reports her discovery of a fast-moving asteroidal
object on Palomar 0.46-m Schmidt films taken by K. Lawrence, P.
Rose, and herself.  The following positions were measured by
Lawrence and Rose:

     1990 UT             R.A. (1950) Decl.       Mag.
     Dec. 15.20660    2 01 45.63   +26 23 04.8   16.3
          15.22795    2 01 47.47   +26 21 47.7
          16.08576    2 03 20.78   +25 30 03.7
          16.16198    2 03 28.27   +25 25 31.0

     The following very preliminary orbital elements are by
B. G. Marsden:

     1990/91      R.A. (1950) Decl.     Delta      r       V
     Dec. 15     2 01.40    +26 35.7    0.298    1.210    15.3
          20     2 10.68    +21 40.7
          25     2 20.84    +17 07.2    0.317    1.198    15.5
          30     2 31.69    +13 00.8
     Jan.  4     2 43.06    + 9 23.6    0.347    1.189    15.8


1990 December 17               (5147)             Daniel W. E. Green

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