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IAUC 7624: C/2001 HT50; 2001bi, 2001bj, 2001bk, 2001bl, 2001bm, 2001bn, 2001bo

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                                                  Circular No. 7624
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 HT50
     S. Pravdo, E. Helin and K. Lawrence, Jet Propulsion Laboratory, report
the discovery of a possible comet by NEAT on CCD images obtained with the
1.2-m Schmidt at Palomar.  T. B. Spahr, Minor Planet Center, has identified
the object with the apparently asteroidal object 2001 HT50, observed by LINEAR
on Apr. 23 and by LONEOS on Apr. 26 (MPS 30375), and has now found observations
back to Mar. 3.  Further details and parabolic orbital elements (T = 2003
July 8, q = 2.80 AU, Peri = 324 deg, Node = 43 deg, Incl. = 163 deg,
equinox 2000.0) are given on MPEC 2001-J31.

     2001 UT             R.A. (2000) Decl.        m2    Observer
     Apr. 23.21809   11 49 06.20   -11 25 18.3   18.4   LINEAR
          26.13959   11 47 16.89   -11 12 36.1   18.5   LONEOS
     May  14.22046   11 37 23.71   - 9 57 32.4   18.3   NEAT


SUPERNOVAE 2001bi, 2001bj, 2001bk, 2001bl, 2001bm, 2001bn, 2001bo
     B. Vicente, K. Vieira, J. Cova, J. Hernandez, C. Abad and C. Briceno,
Centro Investigaciones de Astronomia (CIDA), Merida, on behalf of the QUEST
collaboration (cf. IAUC 7387), report on seven supernovae discovered
with the QUEST 16-CCD array camera on the CIDA 1-m Schmidt telescope at
Llano del Hato Observatory.  The total area searched was 254 deg**2 between
Mar. 15 and 26, to R = 20.8, with each clear night receiving independent
drift scans through B, V and R filters.  Nightly scans continued until
Apr. 4, so the seven objects all have well-sampled three-color lightcurves
over roughly three weeks.  Each supernova was found by subtraction of
QUEST reference images taken between Mar. 3 and 8, and each new object has
been confirmed via six or more independent images taken on three or more
nights with subtractions from three independent reference images.  The host
galaxies for SNe 2001bj and 2001bl are not visible in QUEST data, to R about 21.

SN       2001 UT     R.A.  (2000.0)  Decl.     R      Offset
2001bi   Mar. 24   9 28 37.79  - 0 36 58.1   20.0    1" W, 1" N
2001bj   Mar. 24  10 36 25.83  - 0 58 17.8   20.2       ---
2001bk   Mar. 20  11 25 32.13  - 1 44 01.3   18.2    2" E, 4" S
2001bl   Mar. 24  12 12 57.36  - 0 00 53.1   19.9       ---
2001bm   Mar. 25  13 35 58.65  - 0 45 03.3   19.7    2" E, 0" N
2001bn   Mar. 25  14 30 39.53  - 2 06 00.6   19.4    1" W, 0" N
2001bo   Mar. 25  15 25 40.80  - 1 18 00.5   20.8    1" W, 0" N

                      (C) Copyright 2001 CBAT
2001 May 14                    (7624)              Brian G. Marsden

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