[IAUC] IAUC 8859: P/2007 O2 = P/1998 U2; R CrB [25139-2008/05-R1]
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Circular No. 8859
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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COMET P/2007 O2 = P/1998 U2 (MUELLER)
L. Buzzi and F. Luppi, Varese, Italy, report the recovery of
comet P/1998 U2 (cf. IAUC 7035, 7036), being slightly diffuse on
CCD images obtained with a 0.60-m reflector, with confirming CCD
images by P. Birtwhistle (Great Shefford, Berkshire, U.K., 0.40-m
reflector).
2007 UT R.A. (2000) Decl. Mag. Observer
July 26.09058 3 48 28.53 +21 41 05.3 19.5 Buzzi
26.10107 3 48 29.86 +21 41 09.8 "
27.10651 3 50 39.81 +21 48 37.6 Birtwhistle
27.11524 3 50 40.92 +21 48 43.8 19.5 "
The indicated correction to the predictions in the 2007 Comet
Handbook and on MPC 51823 is Delta(T) = +0.3 day. The following
orbital elements by B. G. Marsden are from 153 observations,
1998-2007 (mean residual 0".6):
Epoch = 1998 Nov. 3.0 TT
T = 1998 Oct. 20.75954 TT Peri. = 49.53569
e = 0.5215660 Node = 336.22405 2000.0
q = 2.0253092 AU Incl. = 2.19329
a = 4.2332052 AU n = 0.11316187 P = 8.71 years
Epoch = 2007 June 29.0 TT
T = 2007 July 8.20087 TT Peri. = 49.73116
e = 0.5206516 Node = 336.11998 2000.0
q = 2.0319152 AU Incl. = 2.18993
a = 4.2389107 AU n = 0.11293347 P = 8.73 years
R CORONAE BOREALIS
E. Broens, Vereniging Voor Sterrenkunde, Belgium, reports that
this variable has begun to fade slowly for the first time since
Feb.-May 2003 (cf. IAUC 8077), when it faded over about 20 days
from a visual mag about 6.1 to minimum at mag about 12.7. Visual
magnitude estimates (non-Belgian data sent directly to the Central
Bureau): June 21.94 UT, 6.0 (E. Muyllaert, Oostende, Belgium);
July 7.93, 6.3 (Muyllaert); 13.85, 6.5 (F. Van Loo, Genk, Belgium);
16.878, 7.1 (S. Baroni, Milan, Italy); 17.837 7.2 (S. Foglia,
Novara, Italy); 18.909, 7.0 (K. Hornoch, Vohancice, Czech Republic);
19.896, 7.0 (Baroni); 20.96, 7.1 (E. Broens, Mol, Belgium); 22.881,
7.3 (Hornoch); 24.862, 7.6 (Foglia); 24.920, 7.4 (Hornoch).
(C) Copyright 2007 CBAT
2007 July 27 (8859) Daniel W. E. Green
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