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IAUC 8182: S/2003 (379) 1; 2003he, 2003hf; C/2003 H1; C/2001 Q4

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IAUC number


                                                  Circular No. 8182
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)


S/2003 (379) 1
     J. L. Margot, California Institute of Technology, reports the
discovery on Aug. 14.6 UT of a satellite of (379) Huenna (V = 12.9)
from adaptive optics H-band imaging with the 10-m W. M. Keck II
telescope on Mauna Kea.  The satellite was observed to follow the
primary at the non-sidereal rate of roughly 10"/hr for a period
exceeding 2 hr.  On Aug. 14.5518 UT, the companion was at a
separation of 0".89 (projected separation 1200 km) in p.a. 34 deg.
The primary-to-secondary H-band flux ratio is about 165, giving a
diameter ratio of about 13.


SUPERNOVAE 2003he AND 2003hf
     Further to IAUC 8179, J. Graham, H. Pugh, and W. Li report the
LOTOSS discovery of two apparent supernovae on unfiltered KAIT
images:

SN      2003 UT       R.A.  (2000.0)  Decl.   Mag.     Offset
2003he  Aug. 11.4   23 58 57.05  - 2 14 53.1  18.7  2".5 W, 6".1 N
2003hf  Aug. 14.2   16 50 48.38  +45 24 01.8  18.4  1".7 W, 6".1 S

Additional approximate KAIT magnitudes:  SN 2003he in MCG -01-1-10,
Aug. 6.4 UT, [19.5; 12.4, 18.1.  SN 2003hf in UGC 10586, Aug. 10.2,
[19.5; 15.2, 17.7.


COMET C/2003 H1 (LINEAR)
     Improved parabolic orbital elements from MPC 49277:

                    Epoch = 2004 Feb.  5.0 TT
     T = 2004 Feb. 22.6097 TT         Peri. = 196.1344
     e = 0.999381                     Node  =  18.9997  2000.0
     q = 2.239691 AU                  Incl. = 138.6689


COMET C/2001 Q4 (NEAT)
     Total visual magnitude estimates:  July 22.69 UT, 13.0 (M.
Mattiazzo, Wallaroo, South Australia, 0.28-m reflector); 27.71,
12.9 (Mattiazzo); Aug. 4.70, 12.6 (D. A. J. Seargent, Cowra,
N.S.W., 0.25-m reflector); 6.71, 12.5 (Seargent).

                      (C) Copyright 2003 CBAT
2003 August 15                 (8182)            Daniel W. E. Green

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