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IAUC 8950: Poss. N IN Oph; P/2008 J3

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IAUC number

                                                  Circular No. 8950
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     S. Nakano, Sumoto, Japan, reports the discovery of another
possible nova (mag 11.3) in Ophiuchus by K. Nishiyama (Kurume,
Fukuoka-ken, Japan) and F. Kabashima (Miyaki-cho, Saga-ken, Japan)
on two unfiltered 30-s CCD frames (limiting mag 13.6) taken on May
31.608 and 31.609 UT using a 105-mm f/5.6 camera lens.  Their
confirming unfiltered CCD images (limiting mag 18.5) with a 40-cm
reflector taken around May 31.628 yield the following precise
position:  R.A. = 17h33m29s.67, Decl. = -27o01'16".4 (equinox
2000.0); their image from May 31.795 yields position end figures
29s.64, 15".9.  They add that nothing is visible at this position
on Digitized Sky Survey red images.  NSV 22564 is located some 2'
away.  Following posting of this object on the Central Bureau's
unconfirmed-objects webpage, several other observers have obtained
confirming photometry and astrometry of the new variable.
Additional magnitudes for this possible nova, from unfiltered CCD
images unless otherwise noted:  1985 May 13, [19.5 (Digitized Sky
Survey red plate taken at the European Observatory, via C. Jacques
and E. Pimentel, Belo Horizonte, Brazil); 1991 Aug. 11, [20: (U.K.
Schmidt Telescope red plate, via E. Guido and G. Sostero,
Remanzacco, Italy); 2008 May 11.661, [13.6 (Nishiyama and Kabashima);
20.649, [12.6 (Nishiyama and Kabashima); 25.688, [11.8 (Nishiyama
and Kabashima); 31.765, 11.1 (K. Kadota, Ageo, Japan, 25-cm
reflector); 31.795, 11.4 (Nishiyama and Kabashima); June 1.540 and
1.595, 11.7 (K. Itagaki, Teppo-cho, Yamagata-ken, Japan, 60-cm
reflector); 1.576, 11.3 (Kadota); 2.022, R about 11.7 (H. Mikuz,
Crni Vrh Observatory, 19-cm reflector); 2.23, B = 13.9, V = 12.8, R
= 11.4 (Guido and Sostero, remotely with a 25-cm reflector near
Mayhill, New Mexico); 2.39, V = 12.8 (Jacques and Pimentel,
remotely with a 25-cm reflector near Mayhill).  All of the non-
discoverer observers above have also provided astrometry for this
apparent nova, yielding position end figures 29s.61 +/- 0s.01,
14".5 +/- 0".3.  Guido and Sostero have posted an image of this
transient at the following URL:  http://tinyurl.com/4vj2qz.

     Additional observations have led to improved orbital elements
that show this comet (cf. IAUC 8942) to be of short period:  T =
2009 Mar. 11.043 TT, q = 2.27346 AU, e = 0.41559, Peri. = 5.035 deg,
Node = 9.764 deg, i = 25.400 deg (equinox 2000.0), P = 7.67 years
(from MPEC 2008-K54).

                      (C) Copyright 2008 CBAT
2008 June 2                    (8950)            Daniel W. E. Green

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