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IAUC 7685: C/2001 Q1; 2001dm

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                                                  Circular No. 7685
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 Q1 (NEAT)
     K. J. Lawrence, E. F. Helin, and S. Pravdo, Jet Propulsion
Laboratory, report the discovery by the Near Earth Asteroid
Tracking program of a new comet on CCD images obtained with the
1.2-m Oschin Schmidt telescope at Palomar (discovery observation
below).

     2001 UT             R.A. (2000) Decl.        m1
     Aug. 17.20219   20 57 12.27   - 8 04 17.1   18.8

Lawrence notes that the object is diffuse with a nuclear
condensation of diameter about 3".  Following posting on the NEO
Confirmation Page, P. Pravec and P. Kusnirak (Ondrejov 0.65-m
reflector) confirmed its cometary appearance on CCD images obtained
on Aug. 18.9 UT, and M. Kocer (Klet 0.57-m reflector) reports that
the object is diffuse and at m_1 = 18.0 on Aug. 18.9.  T. B. Spahr,
Minor Planet Center, has also identified the object in data
obtained by LONEOS on July 16.2.  Full astrometry and the following
parabolic orbital elements appear on MPEC 2001-Q18:

     T = 2001 Sept.28.947 TT          Peri. = 176.275
                                      Node  = 139.109   2000.0
     q = 5.88368 AU                   Incl. =  67.900

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Aug.  9    21 01.01   - 6 50.4   4.893   5.895  170.3    1.7   18.2
     19    20 56.39   - 8 20.6   4.906   5.891  165.3    2.5   18.2
     29    20 52.12   - 9 51.2   4.952   5.888  155.9    4.0   18.2
Sept. 8    20 48.46   -11 19.7   5.027   5.886  145.5    5.6   18.2
     18    20 45.64   -12 43.7   5.130   5.884  135.0    6.9   18.2


SUPERNOVA 2001dm IN NGC 749
     D. Baade, European Southern Observatory (ESO); C. Fransson,
Stockholm; P. Hoeflich, University of Texas; D. A. Howell, Lawrence
Berkeley National Laboratory (LBNL); P. Lundqvist, Stockholm; L.
Wang, LBNL; and J. C. Wheeler, University of Texas, report that SN
2001dm (cf. IAUC 7679) was observed with the Very Large Telescope
UT3 (+ FORS1) at the ESO on Aug. 13 UT.  A preliminary reduction of
the spectrum (range 416-860 nm; spectral resolution 1.27 nm and
0.265 nm/pixel) reveals SN 2001dm to be a type-Ia supernova, about
4-5 weeks past maximum brightness.

                      (C) Copyright 2001 CBAT
2001 August 18                 (7685)            Daniel W. E. Green

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