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IAUC 7790: P/2001 Y1; PECULIAR Var IN Mon

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                                                  Circular No. 7790
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 P/2001 Y1 (HELIN-LAWRENCE)
     On 2001 Dec. 25, S. Nakano (Sumoto, Japan) reported that T.
Oribe had apparently recovered comet P/1993 K2 (= 1993 XI = 1993l)
the night before with the 1.0-m reflector at the Saji Observatory.
The position was within 2" of the prediction by B. G. Marsden on
MPC 34423 (ephemeris on MPC 43696).  No information was provided
about the object's appearance other than m_1 = 19.5.  The comet has
now been independently reported by K. Sarneczky and Z. Heiner in
2002 Jan. 11 data obtained with the 0.6-m Schmidt at Piszkesteto,
at m_1 = 20, but again with no information about the appearance.
These observations confirm a tentative single-night detection by C.
W. Hergenrother and D. Means of an object of stellar appearance (in
an 840-s co-added exposure) at the comet's expected position a year
ago with the Steward Observatory's 2.3-m reflector at Kitt Peak.

Date      UT             R.A. (2000) Decl.        m2    Observer
2001 Jan. 23.38888   10 38 55.54   +19 27 58.5          Hergenrother
          23.39434   10 38 55.39   +19 27 59.6            "
          23.39984   10 38 55.32   +19 28 00.1   21.5     "
     Dec. 24.85868   13 41 58.34   - 0 41 00.0          Oribe
          24.86355   13 41 58.71   - 0 41 02.5            "
          24.86946   13 41 58.97   - 0 41 02.8            "
          24.87397   13 41 59.23   - 0 41 03.5            "
2002 Jan. 11.19365   13 56 49.99   - 1 30 15.6          Sarneczkyy
          11.19753   13 56 50.23   - 1 30 14.5            "
          11.20137   13 56 50.48   - 1 30 16.1            "

     Orbital elements by Marsden from 122 observations, 1993-2002
(mean residual 0".8):

                    Epoch = 2003 Jan.  1.0 TT
     T = 2002 Dec. 22.4510 TT         Peri. = 163.6906
     e = 0.307738                     Node  =  92.0158  2000.0
     q = 3.110106 AU                  Incl. =   9.8713
       a =  4.492670 AU    n = 0.1035016    P =   9.523 years


PECULIAR VARIABLE IN MONOCEROS
     Further to IAUC 7785, J. Bedient adds that the star is not
visible on CCD images in the Stardial archive taken on 141 nights
from 1999 Jan. 12.228 to 2001 Dec. 21.287 UT (RG-1 filter, limiting
mag about 12).

                      (C) Copyright 2002 CBAT
2002 January 14                (7790)            Daniel W. E. Green

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