Electronic Telegram No. 2248
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


COMET C/2010 H1 (GARRADD)
     G. J. Garradd reports his discovery of a probable comet (discovery
position below) in the course of the Siding Spring Survey with the 0.5-m
Uppsala Schmidt.  The images had an FWHM of 5".3, whereas that of nearby stars
was 4".3, and there was a faint tail extending 10" to the north.  After
announcement of the discovery on the NEOCP, A. C. Gilmore and P. M. Kilmartin
reported observations with the 1.0-m f/7.7 reflector at Mt. John Observatory
on Apr. 17.4 UT showing the object as having cometary appearance, with R
magnitude 18.7-19.1 and a short, bright tail in p.a. 355 deg.

     2010 UT             R.A. (2000) Decl.       Mag.   Observer
     Apr. 16.64819   11 46 34.50   -31 19 23.4   18.6   Garradd

     Further astrometry, the following preliminary parabolic orbital elements
and an ephemeris are given on MPEC 2010-H07.

     T = 2010 July 15.125 TT          Peri. = 247.057
                                      Node  = 344.529   2000.0
     q = 2.50955 AU                   Incl. =  33.311


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 April 17                    (CBET 2248)              Brian G. Marsden