[IAUC] IAUC 8833: P/2007 H3; 2006jc [25139-2007/05-R1]

Vie Jun 22 16:59:10 ART 2007

                                                  Circular No. 8833
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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COMET P/2007 H3 (GARRADD)
     G. J. Garradd reports his discovery of a comet on CCD images
obtained with the 0.5-m Uppsala Schmidt at Siding Spring (discovery
observation tabulated below), the object showing a faint tail 15"
long in p.a. 10 deg on the 30-s survey exposure.  Following posting
on the Minor Planet Center's 'NEOCP' webpage, N. Teamo and S.
Hoenig report that their CCD frames taken with a 0.41-m f/8
reflector at Punaauia, Tahiti, on Apr. 23.3 UT show a 4" coma and
an 8" tail in p.a. approximately 35 deg.

     2007 UT             R.A. (2000) Decl.       Mag.
     Apr. 22.51406   11 50 44.52   -42 53 06.8   17.4

The available astrometry (including prediscovery Siding Spring
observations from Mar. 28), the following preliminary elliptical
orbital elements, and an ephemeris appear on MPEC 2007-H55.

     T = 2007 Aug. 15.509 TT          Peri. = 349.968
     e = 0.47547                      Node  = 263.731   2000.0
     q = 1.83355 AU                   Incl. =  25.225
       a =  3.49558 AU     n = 0.150808     P =   6.54 years

SUPERNOVA 2006jc IN UGC 4904
     T. Minezaki, Y. Yoshii, and K. Nomoto, University of Tokyo,
report the following near-infrared photometric magnitudes of SN
2006jc (cf. IAUC 8762; http://www.astronomerstelegram.org/?read=961)
using the multicolor imaging photometer mounted on the MAGNUM 2-m
telescope:  Apr. 9.43 UT, K = 16.2 +/- 0.1; 10.40, H = 17.8 +/- 0.1;
10.43, J = 19.5 +/- 0.3.  Limiting optical magnitudes 3-sigma upper
limit:  Apr. 9.43, V = [22.5; 10.40, R = [22.5; 10.43, I = [21.7.
     K. S. Kawabata, Hiroshima University; K. Maeda, Max Planck
Institute for Astrophysics; M. Tanaka, N. Tominaga, and K. Nomoto,
University of Tokyo; and T. Hattori, National Astronomical
Observatory of Japan, report that optical imaging and PSF
photometry of the peculiar type-Ib supernova 2006jc was performed
with the Subaru 8.2-m telescope (+ FOCAS) on Apr. 10.3 UT, yielding
magnitudes B = 24.0 +/- 0.1, V = 23.4 +/- 0.2, and R = 23.3 +/- 0.2.

                      (C) Copyright 2007 CBAT
2007 April 20                  (8833)            Daniel W. E. Green