[IAUC] IAUC 8769: C/2006 U6; C/2006 U7 [25139-2007/05-R1]
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Vie Jun 22 17:04:20 ART 2007
Circular No. 8769
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Phone 617-495-7440/7244/7444 (for emergency use only)
COMET C/2006 U6 (SPACEWATCH)
An apparently asteroidal object discovered by the Spacewatch
program, and posted on the Minor Planet Center's NEOCP webpage, has
been reported to be marginally cometary in appearance by observers
elsewhere: E. Christensen reports that his inspection of 30-s CCD
frames taken by A. Gibbs at Mt. Lemmon on Oct. 28.2 UT suggests
that the object's images appear soft. J. Young (Table Mountain)
writes that his images, obtained in excellent seeing conditions
(despite smoke from nearby fires) and moonlight on Oct. 30.1, show
a diffuse 3"-4" coma with no hint of a tail.
2006 UT R.A. (2000) Decl. Mag. Observer
Oct. 19.13426 23 32 59.24 + 3 15 56.5 19.8 Spacewatch
The available astrometry, the following parabolic orbital elements,
and an ephemeris appear on MPEC 2006-U79.
T = 2008 June 5.408 TT Peri. = 276.510
Node = 180.182 2000.0
q = 2.50156 AU Incl. = 84.964
COMET C/2006 U7 (GIBBS)
Alex R. Gibbs reports his discovery of a comet on images taken
with the Mt. Lemmon Survey 1.5-m reflector, the object then
reported as diffuse with diameter 7", possibly elongated in p.a.
230 deg. Following posting on the NEOCP, J. Young notes a very
diffuse 4"-5" coma and no tail on images taken at Table Mountain
on Oct. 30.4 UT, adding that the comet is in a faint, somewhat-
dense star field. Follow-up observations at Mt. Lemmon by
Christensen on Oct. 30.4 (four 90-s exposures in good seeing)
reveal a diffuse 5" coma and a 15" tail in p.a. 260 deg.
2006 UT R.A. (2000) Decl. Mag. Observer
Oct. 28.29549 3 31 54.84 +17 55 24.0 20.8 Gibbs
The available astrometry, the following parabolic orbital elements,
and an ephemeris appear on MPEC 2006-U80.
T = 2008 Feb. 23.969 TT Peri. = 68.853
Node = 56.166 2000.0
q = 3.52395 AU Incl. = 11.253
(C) Copyright 2006 CBAT
2006 October 30 (8769) Daniel W. E. Green
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