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IAUC 4742: 1989h; SNe; 1989a

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IAUC number 

                                                  Circular No. 4742
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


PERIODIC COMET CLARK (1989h)
     J. Gibson, Jet Propulsion Laboratory, reports his recovery of
this comet with the Palomar 1.5-m reflector (+ CCD).  A 300-s
integration on Jan. 2 revealed a 5" x 8" elliptical coma with
eccentric condensation, the maximum extent of the coma being toward
p.a. 290 deg from the condensation.  The Jan. 17 and 18 images show a
5" coma with central condensation and a 10" tail in p.a. about 290
deg.  The following observations are in agreement with the orbital
elements on MPC 12128 (ephemeris on MPC 14035).

     1989 UT             R.A. (1950) Decl.       m1
     Jan.  2.54520   11 31 29.33   +15 38 34.4   20
           2.54984   11 31 29.42   +15 38 35.0
           2.55384   11 31 29.50   +15 38 35.5
           2.55812   11 31 29.57   +15 38 36.1
          17.43984   11 33 52.39   +16 26 39.4   19
          17.44553   11 33 52.38   +16 26 41.0
          17.45216   11 33 52.34   +16 26 42.8
          18.49492   11 33 51.07   +16 31 18.1   19
          18.50016   11 33 51.04   +16 31 19.4
          18.50530   11 33 51.01   +16 31 20.6


SUPERNOVAE
     C. Pollas, Observatoire de la Cote d'Azur, telexes the following
CCD magnitudes obtained at Pic du Midi Observatory by C. Buil, J. P.
Dambrine, J. Lorsignol, P. Prugniel, P. Roth, C. Schmitt, and E.
Thouvenot with the 1-m telescope (Feb. 19 data by A. Klotz and
Thouvenot):  SN 1988Z in MCG +03-28-022, Feb. 7.10 UT, V = 16.84, R =
16.47; Feb. 9.08, V = 16.98, R = 16.49.  SN 1989B in NGC 3627, Feb.
6.10, R = 11.84; Feb. 8.08, V = 11.80, R = 11.76; Feb. 19.20, V =
12.13 +/- 0.05, R = 12.23 +/- 0.05, I = 12.85 +/- 0.10.  SN 1989C in
an anonymous galaxy, Feb. 11.06, V = 15.55, R = 16.09.


COMET YANAKA (1989a)
     G. Cremonese and M. D'Onofrio, Asiago Astrophysical Observatory
report the following Cousins magnitude obtained with the 1.82-m Asiago
telescope (+ CCD; aperture 11".2):  Feb. 8.2 UT, R = 17.3 +/- 0.2.
The comet exhibited a small, diffuse coma.


1989 February 22               (4742)             Daniel W. E. Green

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