[IAUC] IAUC 8853: COMET P/2007 J7 (LINEAR-MUELLER); C/2005 B5, C/2005 B6 [25139-2008/05-R1]
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Mar Jun 26 19:13:53 ART 2007
Circular No. 8853
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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URL http://www.cfa.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
COMET P/2007 J7 (LINEAR-MUELLER)
Comet P/1998 S1 (cf. IAUC 7031) has been recovered
independently by R. H. McNaught on CCD images taken with the 0.5-m
Uppsala Schmidt at Siding Spring on May 13 UT and by J. V. Scotti
on CCD images taken with the Spacewatch 1.8-m f/2.7 reflector at
Kitt Peak on June 26.5. McNaught described the comet as faint and
almost stellar, but with a 20" tail in p.a. 240 deg. Scotti noted
the comet to have a 9" coma and a 64" tail in p.a. 241 deg. The
indicated Delta(T) correction to the prediction on MPC 51824 is
+0.03 day [Delta(T) = +0.013 day to the prediction by S. Nakano in
the 2007 Comet Handbook, p. H9]. The orbital elements by B. G.
Marsden below are from 265 observations, 1998-2007 (mean residual
0".6).
2007 UT R.A. (2000) Decl. Mag. Observer
May 13.78886 23 22 36.76 - 9 14 02.9 18.2 McNaught
June 26.45086 0 08 30.27 - 3 24 01.9 18.1 Scotti
26.45843 0 08 30.69 - 3 23 57.4 18.0 "
26.46666 0 08 31.06 - 3 23 53.7 18.0 "
Epoch = 1998 Nov. 3.0 TT
T = 1998 Nov. 2.7434 TT Peri. = 26.3621
e = 0.416704 Node = 359.1837 2000.0
q = 2.548366 AU Incl. = 10.5598
a = 4.368908 AU n = 0.1079306 P = 9.132 years
Epoch = 2007 Dec. 6.0 TT
T = 2007 Dec. 16.1419 TT Peri. = 26.4358
e = 0.415879 Node = 359.1499 2000.0
q = 2.552135 AU Incl. = 10.5462
a = 4.369188 AU n = 0.1079202 P = 9.133 years
COMETS C/2005 B5 AND C/2005 B6 (SOHO)
Two additional Kreutz sungrazing comets (cf. IAUC 8850) have
been found by B. Zhou on 2005 archival SOHO website images. Each
was stellar in appearance and faint, reaching mag about 7-7.5.
Comet 2005 UT R.A.(2000)Decl. Inst. F MPEC
C/2005 B5 Jan. 22.221 20 33.1 -21 40 C3 BZ 2007-L16
C/2005 B6 30.571 21 06.8 -18 58 C3 BZ 2007-L16
(C) Copyright 2007 CBAT
2007 June 26 (8853) Daniel W. E. Green
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