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IAUC 7579: 2001R; 2001A, 2001M; C/2001 C1

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                                                  Circular No. 7579
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)


SUPERNOVA 2001R IN NGC 5172
     D. Weisz, M. Modjaz, and W. D. Li, University of California at
Berkeley, on behalf of LOTOSS (cf. IAUC 7514), report the discovery
of an apparent supernova (mag about 18.5) on unfiltered images
taken with the 0.8-m Katzman Automatic Imaging Telescope (KAIT) on
Jan. 6.5, Feb. 3.5, and 4.5 UT.  SN 2001R is located at R.A. =
13h29m16s.93, Decl. = +17o02'41".2 (equinox 2000.0), which is 33".2
west and 25".0 south of the nucleus of NGC 5172.  A KAIT image
taken on 2000 June 20.2 showed nothing at this position (limiting
mag about 19.0).  SN 1998cc also occurred in NGC 5172.


SUPERNOVAE 2001A AND 2001M
     A. V. Filippenko, R. Chornock, and M. Modjaz, University of
California at Berkeley, report that inspection of CCD spectra
(range 330-1000 nm) of SN 2001A (cf. IAUC 7554), obtained on Feb. 1
UT with the Shane 3-m reflector at Lick Observatory, reveals that
the object is a type-Ia supernova, roughly 5-6 weeks past maximum
brightness.  Spectra of SN 2001M (taken in the same way at Lick)
confirm that it is a type-Ic supernova, 1-2 weeks past maximum
brightness (cf. IAUC 7576).


COMET C/2001 C1 (LINEAR)
     Additional observations and the following very uncertain
parabolic orbital elements appear on MPEC 2001-C07:

     T = 2002 Jan. 27.671 TT          Peri. = 210.683
                                      Node  =  33.970   2000.0
     q = 5.51440 AU                   Incl. =  68.112

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Jan. 31    14 41.70   -10 08.5   6.028   6.108   90.0    9.3   17.8
Feb.  5    14 41.87   -10 31.0   5.929   6.092   94.9    9.3   17.7
     10    14 41.76   -10 52.9   5.830   6.077   99.8    9.2   17.7
     15    14 41.36   -11 14.3   5.733   6.062  104.9    9.1   17.6
     20    14 40.66   -11 35.2   5.638   6.048  110.0    8.8   17.6
     25    14 39.64   -11 55.4   5.545   6.033  115.1    8.5   17.5
Mar.  2    14 38.30   -12 15.2   5.456   6.019  120.4    8.2   17.5
      7    14 36.65   -12 34.4   5.371   6.004  125.7    7.7   17.4
     12    14 34.68   -12 53.1   5.291   5.990  131.0    7.2   17.4

                      (C) Copyright 2001 CBAT
2001 February 5                (7579)            Daniel W. E. Green

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