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IAUC 4713: 1989 AZ; 1988Z

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IAUC number 

                                                  Circular No. 4713
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


1989 AZ
     A fast-moving asteroidal object has been discovered by C. S.
and E. M. Shoemaker with the 0.46-m Palomar Schmidt as follows:

     1989 UT           R.A. (1950) Decl.      Mag.
     Jan.  8.495      10 04.5      +20 42      17
           8.526      10 04.1      +20 39
           9.428       9 56.0      +19 15
          13.328       9 27.5      +14 12

     The following orbital elements are completely hypothetical, but
the ephemeris should be useful to observers:

     T = 1988 Nov. 21.58 ET           Peri. = 112.42
     e = 0.5703                       Node  = 295.46    1950.0
     q = 0.8594 AU                    Incl. =  12.26
       a =  2.0000 AU      n = 0.34846      P =   2.83 years

     1989 ET      R.A. (1950) Decl.     Delta      r        V
     Jan. 12     9 36.06    +15 44.9    0.134    1.102    15.9
          13     9 29.50    +14 34.2
          14     9 23.50    +13 29.3    0.147    1.118    16.0
          15     9 17.98    +12 29.6
          16     9 12.91    +11 34.8    0.160    1.133    16.1
          17     9 08.23    +10 44.5
          18     9 03.90    + 9 58.4    0.174    1.149    16.3
          19     8 59.89    + 9 16.2
          20     8 56.18    + 8 37.4    0.188    1.166    16.4


SUPERNOVA 1988Z IN MCG +03-28-022
    A. V. Filippenko, University of California at Berkeley, reports that
a spectrum (range 310-910 nm, resolution 1.5 nm) of SN 1988Z (IAUC 4691,
4693), obtained on Jan. 4 with a CCD spectrograph on the 3-m Shane
reflector at Lick Observatory, confirms that the object is probably a
peculiar type II supernova.  The unreduced spectrum exhibits weak, broad
H-alpha emission superposed on a smooth continuum.  Blends of Fe II and
several other weak features may be present.  In some respects the
spectrum resembles that of SN 1987F (IAUC 4381, 4385) at early times.


1989 January 13                (4713)              Brian G. Marsden

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