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THE ASTRONOMER Electronic Circular No 2712      2011 Feb 14 20.42UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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(99913) 1997 CZ5
D. Higgins, Canberra, Australia and others report on CBET 2648
that photometric observations obtained during 2011 Jan. 8-30 reveal that 
minor planet (99913) is a binary system with an orbital period of 14.68 
hr.  The primary shows a period of 2.83507 +/- 0.00002 hr, and it has a 
light curve amplitude of 0.19 mag. Mutual eclipse/occultation events 
that are 0.033- and 0.042-magnitude deep indicate a secondary-to-primary 
mean-diameter ratio of 0.19 +/- 0.02.

NOVA SAGITTARII 2011 = PNV J17474639-2335112
Further to the note on TA E-Circular 2708, Kazuyoshi Imamura, Okayama 
University of Science (OUS), reports on CBET 2644 that a low-dispersion 
spectrum (R about 400) of PNV J17474639-2335112 was obtained on 2011 
Jan. 28.88UT with the 0.28-m Schmidt-Cassegrain telescope (+ DSS-7) at 
the OUS Observatory, showing a clear H_alpha emission line (FWHM 
approximately 1300 km/s), suggesting that the object is a classical 
nova.

The spectrum is posted at:
http://blog-imgs-32-origin.fc2.com/t/n/b/tnblab/PN_Sgr_sp20110128.png

Guy M Hurst