[IAUC] IAUC 8902: P/2006 W4 = P/1993 D1; V597 Pup [25139-2008/05-R1]
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Mar Dic 4 19:38:08 ART 2007
Circular No. 8902
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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COMET P/2006 W4 = P/1993 D1 (HILL)
S. Foglia, R. Matson, and M. Tombelli report the
identification of "precovery" images of comet P/2006 W4 (cf. IAUC
8779), aided by the orbital elements published on MPEC 2007-X14
[with indicated Delta(T) = +1.06 days when run back to 1992], and
their astrometric measurements are provided below from the trails
on the two U.K. Schmidt Telescope plates.
1993 UT R.A. (2000) Decl.
Feb. 26.53282 9 44 59.08 -34 38 11.0
26.57795 9 44 57.60 -34 38 01.8
Apr. 5.58208 13 04 38.14 -37 52 27.4
5.62375 13 04 36.85 -37 52 15.9
The following orbital elements by B. G. Marsden are from 92
observations, 1993-2007 (mean residual 0".6):
Epoch = 1992 June 27.0 TT
T = 1992 June 21.6666 TT Peri. = 247.5818
e = 0.314858 Node = 243.4600 2000.0
q = 4.416239 AU Incl. = 36.2938
a = 6.445725 AU n = 0.0602277 P = 16.36 years
Epoch = 2009 Jan. 9.0 TT
T = 2009 Jan. 21.0916 TT Peri. = 249.6184
e = 0.314866 Node = 243.2496 2000.0
q = 4.438583 AU Incl. = 36.3618
a = 6.478413 AU n = 0.0597725 P = 16.49 years
V597 PUPPIS
R. J. Rudy, R. W. Russell, and D. K. Lynch, The Aerospace
Corporation; and C. E. Woodward, University of Minnesota, report
0.8- to 2.5-micron spectroscopy of this nova (cf. IAUC 8895, 8896)
using the Infrared Telescope Facility (+ SpeX) on Nov. 30.54 UT.
V597 Pup was in its early stage of development. He I 1.0830-
microns was very strong, as was He I 20581-microns. The O I lines
were strong, and Brackett-gamma showed a
doubled line profile. There was no evidence of He II lines or thermal
emission from dust. The FWHM of the lines was approximately 3900 km/s.
Visual magnitude estimates by A. Amorim, Florianopolis, Brazil:
Nov. 16.047 UT, 8.1; 20.041, 9.7; 22.078, 9.8; 23.040, 10.0.
(C) Copyright 2007 CBAT
2007 December 4 (8902) Daniel W. E. Green
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