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IAUC 7695: C/2001 Q4; V4739 Sgr = N Sgr 2001 No. 2

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                                                  Circular No. 7695
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2001 Q4 (NEAT)
     S. H. Pravdo, E. F. Helin, and K. J. Lawrence, Jet Propulsion
Laboratory, report the discovery of a comet on CCD images taken
with the 1.2-m Schmidt telescope at Palomar in the course of the
NEAT program; their images on Aug. 24, 26, and 27 show a
spherically symmetrical nebulosity with diameter about 8".  CCD
total magnitude estimates:  Aug. 27.08 UT, 17.8 (J. Ticha, M. Tichy,
and P. Jelinek, Klet Observatory, 0.57-m reflector); Aug. 27.47,
17.3 (P. J. Shelus, McDonald Observatory, 0.76-m reflector).

     2001 UT             R.A. (2000) Decl.        m1
     Aug. 24.40491    2 44 36.94   -24 58 42.0   20.0

     Full astrometry is given on MPEC 2001-Q67.  The orbital
elements are very uncertain, and those by B. G. Marsden given below
represent a compromise solution:

     T = 2005 Aug. 25.340 TT          Peri. = 325.884
                                      Node  = 218.402   2000.0
     q = 4.09424 AU                   Incl. = 108.688

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Aug. 19     2 45.08   -24 31.8  11.099  11.495  110.6    4.7   17.3
     29     2 44.07   -25 21.9  10.930  11.437  117.9    4.5   17.3
Sept. 8     2 42.42   -26 13.0  10.777  11.380  124.6    4.2   17.2
     18     2 40.12   -27 03.9  10.643  11.322  130.6    3.9   17.2
     28     2 37.24   -27 52.9  10.531  11.264  135.2    3.6   17.1


V4739 SAGITTARII = NOVA SAGITTARII 2001 No. 2
     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the designation V4739 Sgr has been given to the nova reported on
IAUC 7692.
     K. Takamizawa, Saku-machi, Nagano, Japan, reports prediscovery
limiting magnitudes (nova not detected) from unfiltered T-Max 400
films:  Aug. 24.477 UT, [12.1; 24.480, [12.1.
     A. C. Gilmore forwards additional photometry by P. M.
Kilmartin at Mt. John:  Aug. 27.408 UT, V = 7.66, U-B = -0.78, B-V
= +0.55, V-R = +0.60, V-I = +1.10, air mass 1.06; 27.506, 7.94,
-0.86, +0.53, +0.68, +1.22, 1.35; 27.552, 8.04, -0.87, +0.53,
+0.72, +1.27, 1.71; 27.615, 8.16, -0.90, +0.53, +0.77, +1.33, 2.89;
28.318, 9.12, -0.93, +0.28, +1.09, +1.53, 1.06; 28.366, 9.27,
-0.86, +0.26, +1.13, +1.56, 1.03.

                      (C) Copyright 2001 CBAT
2001 August 28                 (7695)            Daniel W. E. Green

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