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IAUC 8817: S/2004 (45) 1; 186P; 2007af

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IAUC number 

                                                  Circular No. 8817
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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


S/2004 (45) 1
     F. Marchis and M. Baek, University of California at Berkeley;
and P. Descamps, J. Berthier, D. Hestroffer, and F. Vachier,
Institut de Mecanique Celeste et de Calcul des Ephemerides, Paris,
report the discovery of a new satellite orbiting (45) Eugenia.
S/2004 (45) 1 was detected after careful analysis of three
observations collected with K-band filters using the Very Large
Telescope 'YEPUN' and its adaptive-optics system (NACO) on 2004 Feb.
14.15404, 15.14620, and 16.15435 UT, the satellite appearing at a
distance of about 0".4 from the primary in p.a. 156, 321, and 124
degrees, respectively.  Based on the integrated brightness ratio of
about 7.9 between the satellite and the primary, the diameter of
S/2004 (45) 1 is estimated to be about 6 km.  The orbital
parameters of this satellite give a mass for the system in
agreement with the mass derived from the study of previously known
satellite, (45) Eugenia I (Petit-Prince; cf. IAUCs 7129, 7503).


COMET 186P/2007 B3 (GARRADD)
     Further to IAUC 8801 and 8806, M. Meyer (Limburg, Germany)
reports that he has identified this comet on Digitized Sky Survey
plates taken with the U.K. Schmidt telescope on 1975 May 31 and
June 3 (two red plates each; centers of trails measured) and on
1996 Feb. 26 (single red plate; comet trail involved with star,
ends of trail measured).  In verifying these identifications, G. V.
Williams (Minor Planet Center) then identified P/2007 B3 with an
18th-magnitude comet reported by R. D. Eberst (cf. IAUC 3247) one
year after the U.K. Schmidt plates of 1977 July 18 and 19 were
taken (later designated X/1977 O1 in the Catalogue of Cometary
Orbits 1995).  Meyer's astrometry and the precessed Eberst
astrometry appear on MPEC 2007-D71 with new orbital elements and
residuals; these observations at multiple apparitions permit the
numbering of this comet as 186P/Garradd (cf. MPC 58997).


SUPERNOVA 2007af IN NGC 5584
     S. Nakano, Sumoto, Japan, reports the discovery by K. Itagaki
(cf. IAUC 8792) of a fairly bright supernova located at R.A. =
14h22m21s.03, Decl. = -0o23'37".6 (equinox 2000.0), which is 40"
west and 22" south of the center of NGC 5584.  Unfiltered CCD
magnitudes for 2007af from Itagaki:  Feb. 24.81 UT, [19.0; 25.73,
[18.5; Mar. 1.84, 15.4 (discovery); 2.576, 15.3; 7.648, 13.7.  SN
2007af is a type-ia supernova that was discovered well before
maximum light (spectroscopic details on CBET 865).

                      (C) Copyright 2007 CBAT
2007 March 7                   (8817)            Daniel W. E. Green

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