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IAUC 7942: 2002 O5; V1548 Aql; C/2002 O4

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IAUC number

                                                  Circular No. 7942
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

COMET 2002 O5
     S. Pravdo and K. Lawrence, Jet Propulsion Laboratory, report
the discovery of a comet (with nuclear condensation of diameter
about 6" and tail extending 12" to the southwest) on NEAT images
taken at Haleakala on July 30.25 UT. After the object was placed
on the NEO Confirmation Page, confirmation of cometary activity
was reported by: R. Fredrick, K. Smalley, and R. Trentman,
Louisburg, Kansas, with a 0.75-m reflector (tail 40" long in
p.a. 130 deg); P. M. Kilmartin, Mt John Observatory, New Zealand,
with a 0.6-m reflector (short tail in about p.a. 130 deg); and
R. H. McNaught and G. J. Garradd, Siding Springs Observatory,
Australia, with a 1.0-m reflector (tail 13" long in p.a. 125 deg).

     2002 UT             R.A. (2000) Decl.        m1    Observer
     July 30.25205   16 06 03.62   - 5 36 39.5   17.2   NEAT
          31.21119   16 09 40.61   - 4 38 20.8   15.3   Fredrick
          31.32130   16 10 06.93   - 4 31 06.2   17.1   Gilmore
          31.45306   16 10 36.23   - 4 23 14.8   16     McNaught

     D. K. Lynch, S. Mazuk, R. J. Rudy, C. C. Venturini, The
Aerospace Corporation; R.C. Puetter, Center for Astrophysics and
Space Science, University of California at San Diego; and R. B.
Perry, NASA Langely Research Center, report 0.8-2.5 micron
spectroscopy using the Aerospace Corporation Near-Infrared Imaging
Spectrograph and the Lick Observatory 3-m telescope on July 17.4 UT
(about 431 days after discovery): "The nova is well into its
nebular phase.  He I at 1.0830 micron is by far the strongest
line in a spectrum that displays full Paschen and Brackett series
of H I.  He II lines are present as well but no coronal lines are
detected. The emission lines are comparatively narrow for a nova
with FWHM of 800-900 km/s."

     Visual m1 estimates: July 28.86 UT, 11.3 (M. Reszelski,
Szamotuly, Poland, 0.41-m reflector); 28.94, 10.6 (M. Lehky,
Hradec Kralove, Czech Republic, 0.42-m reflector); 29.91, 10.0
(R. J. Bouma, Groningen, The Netherlands, 0.25-m reflector);
29.94, 10.2 (Lehky); 29.94, 9.8 (J. J. Gonzalez, Leon, Spain,
0.20-m reflector); 30.71, 10.0 (K. Yoshimoto, Yamaguchi, Japan,
0.25-m refiector).

                      (C) Copyright 2002 CBAT
2002 July 31                   (7942)          Carl W. Hergenrother

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