[IAUC] IAUC 9005: COMET P/2008 X4 = P/2003 K2 (CHRISTENSEN); 208P; V5580 Sgr [25139-2009/08-R1]
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Circular No. 9005
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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COMET P/2008 X4 = P/2003 K2 (CHRISTENSEN)
K. Battams, Naval Research Laboratory, writes that A. Watson
found a comet on SECCHI HI1-B images (via the STEREO-B spacecraft;
cf. IAUC 8926, 8930), Battams noting a very faint, short tail
("discovery" observation tabulated below). R. Kracht made
measurements of the object's position and computed a parabolic
orbit, from which M. Meyer suggested identity with comet P/2003 K2
(cf. IAUC 8136, 8138, 8145). The indicated correction to the
prediction on MPC 56802 is Delta(T) = -22 days.
2008 UT R.A. (2000) Decl. Mag.
Dec. 8.239 12 56.2 -17 06 10
Astrometric measurements of P/2008 X4 by Battams, with reductions
by B. G. Marsden, are published on MPEC 2008-X81, together with the
following orbital elements by Marsden -- linking the two
apparitions (from 227 observations; mean residual 2".9) -- and an
ephemeris.
Epoch = 2003 Mar. 22.0 TT
T = 2003 Apr. 7.8452 TT Peri. = 345.4643
e = 0.828360 Node = 93.9292 2000.0
q = 0.548752 AU Incl. = 10.1398
a = 3.197110 AU n = 0.1724121 P = 5.72 years
Epoch = 2008 Nov. 30.0 TT
T = 2008 Dec. 19.9610 TT Peri. = 345.7643
e = 0.831673 Node = 93.8928 2000.0
q = 0.534811 AU Incl. = 10.2156
a = 3.177213 AU n = 0.1740342 P = 5.66 years
COMETS 208P/McMILLAN AND 209P/LINEAR
Comet P/2008 U1 (McMillan) = P/2000 S7 (cf. IAUCs 8997, 9000)
has been given the permanent designation 208P. Comet P/2008 X2
(LINEAR) = P/2004 CB (cf. IAUC 9002) is assigned the permanent
designation 209P.
V5580 SAGITTARII
W. Liller, Vina del Mar, Chile, provides a revised position
for this nova, which should replace his position published on IAUC
9004: R.A. = 18h22m01s.45 +/- 0s.06, Decl. = -28o02'38".1 +/- 3".5
(equinox 2000.0).
(C) Copyright 2008 CBAT
2008 December 12 (9005) Daniel W. E. Green
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