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IAUC 4468: 1987y; 1987A; N LMC

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                                                  Circular No. 4468
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444

COMET LEVY (1987y)
     David Levy, Tucson, AZ, has discovered a new comet, about
which the following information is available:

      1987 UT         R.A. (1950) Decl.    m1      Observer
      Oct. 11.13     14.6       +17        9.5     Levy
           11.996    14 38m     +17.4      9.5     Dickinson
           12.087    14 38.3    +17 18'    9       Scotti
           12.111    14 38.5    +17 18               "

D. Levy (Tucson, AZ).  0.20-m f/7 reflector.  Position uncertain.
   Object diffuse with condensation, no tail.  Comet observed only
   briefly but eastward motion suspected.
T. Dickinson (Yarker, Ontario).  0.14-m refractor.
J. V. Scotti (Tucson, AZ).  0.20-m f/7 reflector.

     Total visual magnitude estimates: Oct. 11.99 UT, 9.6 (R.
Meier, Ottawa, ON, 0.15-m refractor); 12.08, 9.3 (Levy).

     P. J. McGregor and A. R. Hyland, Mount Stromlo and Siding
Spring Observatories, report near-infrared spectra with a resolving
power of about 500 obtained using the Australian National University's
2.3-m telescope: "CO first-overtone emission at 2.3 microns
(cf. IAUC 4457) was present on July 8 and strengthened relative to
the continuum in spectra on Aug. 19 and Sept. 1.  No CO emission
was seen in a similar spectrum taken on June 6.  The CO bands are
broad with individual bandheads being completely blended in the
early spectra and only just visible in the Sept. 1 spectrum, indicating
that the emitting molecular gas participates in the outflow.
The emission is probably collisionally excited at high densities
near the photosphere and suggests that processed material is now
flowing through the photosphere."
     Visual magnitude estimate by A. C. Beresford, Adelaide, South
Australia: Oct. 11.60 UT, 5.3.

     Visual magnitude estimates by R. H. McNaught, Coonabarabran,
N.S.W.: Oct 1.77 UT, 14.4; 9.4, 15.0:.

1987 October 12                (4468)              Brian G. Marsden

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