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IAUC 8951: V2671 Oph = N Oph 2008 No. 2; V2487 Oph; C/2007 W1

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                                                  Circular No. 8951
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)

     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the nova reported on IAUC 8950 is being assigned the variable-star
designation V2671 Oph.
     K. Kinugasa, H. Taguchi and S. Honda, Gunma Astronomical
Observatory (GAO); and H. Yamaoka, Kyushu University, write that a
low-resolution spectrogram (range 400-800 nm; resolution about 1.0
nm) of V2671 Oph was obtained with the GAO 1.5-m telescope (+ GLOWS)
on June 6.6 UT.  The spectrum shows a relatively red continuum and
Balmer emission lines without P-Cyg profiles; also present are a
strong O I emission line and many Fe II emission lines.  This
confirms that the object is a nova after maximum.

     A. Pagnotta, B. E. Schaefer, and L. Xiao, Louisiana State
University, report their discovery of a previously unknown eruption
of the nova V2487 Oph (Nova Oph 1998) in the Harvard College
Observatory archival photograph collection.  Plate AM505 shows
V2487 Oph at B = 10.3 on 1900 June 20.  This is close to its peak
magnitude in 1998, which was reported to be 9.5 in the more recent
outburst.  They identified V2487 Oph as a strong recurrent nova
candidate because of its low outburst amplitude, very fast decline
rate, high expansion velocity, and the presence of high-excitation
lines in its outburst spectrum.  V2487 Oph was also identified as
a good candidate by Hachisu et al. (2002, ASP Conf. Proc. 261,
629), based on characteristics of its light curve.  With this
discovery, V2487 Oph becomes the tenth known galactic recurrent

     Total-magnitude and coma-diameter estimates (cf. IAUC 8945):
May 21.37 UT, 5.8, 15' (M. Mattiazzo, Castlemaine, Victoria, 8x40
binoculars); 23.95, 5.7, 20' (M. Goiato, Aracatuba, Brazil, 7x50
binoculars); May 28.39, 5.2, 18' (Mattiazzo); June 2.40, 4.9, 20'
(Mattiazzo); 4.92, 5.3, 15' (W. Souza, Sao Paulo, Brazil, 7x50
binoculars); 5.90, 5.5, 15' (A. Amorim, Florianopolis, Brazil,
10x50 binoculars); 6.94, 5.1, 18' (Goiato; moonlight).

                      (C) Copyright 2008 CBAT
2008 June 7                    (8951)            Daniel W. E. Green

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