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IAUC 7698: C/2001 Q6; V4739 Sgr

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                                                  Circular No. 7698
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2001 Q6 (NEAT)
     S. H. Pravdo, E. F. Helin, and K. J. Lawrence, Jet Propulsion
Laboratory, report the discovery of another comet on CCD images
taken with the 1.2-m Schmidt telescope at Palomar in the course of
the NEAT program; their discovery image on Aug. 28 (given below)
shows a central nebulosity of diameter about 3" and a tail about
10" long toward the west-southwest.  Other reported physical
descriptions from CCD images include:  Aug. 28.98 UT, diffuse (M.
Tichy, Klet,  0.57-m reflector); 29.05, diffuse object (m_1 = 16.4)
with a bright nucleus, m_2 = 17.9 (L. Sarounova and M. Wolf,
Ondrejov, 0.65-m reflector); 29.38, coma diameter about 10" (K.
Smalley, Louisburg, KS, 0.75-m reflector); 29.44, well-condensed
coma, broad tail 15" long in p.a. 240 deg (D. Balam, Dominion
Astrophysical Observatory, 1.82-m Plaskett telescope); 29.47, fuzzy
with a hint of a bulge to the southwest (P. J. Shelus, McDonald
Observatory, 0.76-m reflector).

     2001 UT             R.A. (2000) Decl.        m1
     Aug. 28.41375    3 35 29.10   + 9 32 40.2   17.6

     Additional astrometry and the following preliminary parabolic
orbital elements (from 25 observations, Aug. 28-29) appear on MPEC
2001-Q70:

     T = 2001 Nov.  3.898 TT          Peri. =  38.984
                                      Node  =  23.312   2000.0
     q = 1.46749 AU                   Incl. =  57.518

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Aug. 29     3 35.92   + 9 54.8   1.230   1.740  101.5   34.7   16.4
Sept. 3     3 39.46   +13 17.5   1.141   1.705  104.7   34.9   16.1
      8     3 42.46   +17 09.7   1.056   1.671  108.1   35.0   15.8
     13     3 44.81   +21 36.7   0.978   1.639  111.4   34.9   15.6
     18     3 46.29   +26 43.4   0.906   1.609  114.7   34.6   15.4
     23     3 46.61   +32 33.4   0.843   1.582  117.6   34.2   15.1
     28     3 45.33   +39 07.0   0.792   1.557  120.1   33.8   14.9
Oct.  3     3 41.72   +46 19.1   0.753   1.535  121.6   33.7   14.7
      8     3 34.48   +53 57.0   0.728   1.516  122.0   34.0   14.6


V4739 SAGITTARII
     Photometry by A. C. Gilmore, Mt. John (IAUC 7695): Aug. 29.349
UT, V = 9.94, U-B = -0.85, B-V =  -0.03, V-R = +1.37, V-I = +1.45.

                      (C) Copyright 2001 CBAT
2001 August 29                 (7698)            Daniel W. E. Green

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