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IAUC 8899: C/2007 W1; V598 Pup

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                                                  Circular No. 8899
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2007 W1 (BOATTINI)
     A. Boattini reports the discovery of a comet found on CCD
images taken with the Mt. Lemmon Survey's 1.5-m reflector
(discovery observation tabulated below), noting that four co-added
30-s exposures show a slightly asymmetric condensation of size
about 8" x 6" with the longer axis in p.a. 290-300 deg.  Boattini
adds that ten co-added 90-s CCD exposures taken by C. Snodgrass
with the European Southern Observatory's 3.58-m New Technology
Telescope (+ EMMI) on Nov. 23.34-23.36 UT show a coma of size about
6" x 7" and a very faint tail in p.a. 293 deg extending about 9"
from the comet's center.  Following posting on the Minor Planet
Center's NEOCP webpage, E. Guido and G. Sostero (Castellammare di
Stabia, Italy) report that CCD images obtained remotely with a
0.25-m f/3.4 reflector near Mayhill, NM, U.S.A., on Nov. 21.5 shows
(via 30 co-added exposures) a coma with diameter about 12" that is
elongated toward the southeast.

     2007 UT             R.A. (2000) Decl.       Mag.
     Nov. 20.48331   11 45 54.46   + 0 18 59.7   18.1

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2007-W63.

     T = 2008 June 14.300 TT          Peri. = 310.982
                                      Node  = 334.585   2000.0
     q = 0.72012 AU                   Incl. =  10.352


V598 PUPPIS
     G. Pojmanski, D. Szczygiel, and B. Pilecki, Warsaw University
Astronomical Observatory, report the following prediscovery V
magnitudes for this nova (cf. IAUC 8898) from 3-min CCD exposures
obtained with a 70-mm (200-mm-f.l.) f/2.8 telephoto lens in the
course of the All Sky Automated Survey (pixel size 14".8),
indicating that the object erupted in early June and reached V
about 4.1 (when the images were saturated, and aperture photometry
often underestimates the true stellar brightness by 0.1-0.5 mag):
May 8.059 UT, [14:; 12.996, [14:; June 1.966, [14:; 5.968, 4.08;
17.954, 6.50; Aug. 18.429, 9.28; 22.412, 9.33; 28.396, 9.58; Sept.
1.415, 9.44; 5.408, 9.49; 11.399, 9.56; 19.383, 9.69; 22.390, 9.74;
26.355, 9.77; 30.358, 9.86; Oct. 4.350, 9.93; 8.343, 9.98; 12.329,
10.02; Nov. 4.281, 10.36; 7.329, 10.43; 14.353, 10.45; 18.261,
10.55.  The nova also was not visible in an I-band image taken on
June 2.978.

                      (C) Copyright 2007 CBAT
2007 November 23               (8899)            Daniel W. E. Green

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