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IAUC 8641: 2005lr; V2361 Cyg; N LMC 2005; P/2005 W3

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IAUC number

                                                  Circular No. 8641
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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2005lr IN ESO 492-G2
     Further to IAUC 8634, M. Baek and W. Li report the LOSS
discovery of an apparent supernova on unfiltered KAIT images.  SN
2005lr is located at R.A. = 7h11m39s.03, Decl. = -26o42'20".2
(equinox 2000.0), which is 18".8 west and 2".1 south of the nucleus
of the galaxy ESO 492-G2.  Available magnitudes:  2003 Oct. 29.45
UT, [19.5; 2005 Oct. 25.40, [19.0; Nov. 5.41, [18.5; Dec. 4.41,
18.5; 5.39, 18.5.

     C. C. Venturini, R. J. Rudy, D. K. Lynch, and S. Mazuk,
Aerospace Corporation; R. C. Puetter, University of California at
San Diego; R. B. Perry, Langley Research Center, NASA; and B. Walp,
Lick Observatory, report 0.47- to 2.5-micron spectroscopy of V2361
Cyg (cf. IAUC 8483, 8487) with the Lick 3.0-m telescope (+ VNIRIS)
at Nov. 13.212 UT.  The near-infrared excess has diminished, which
suggests a lowering of the dust temperature.  The object is not as
heavily extincted as was previously observed, probably a result of
dissipation of a dust shell formed after outburst.  The lower-
excitation coronal lines of [Si VI] and [Ca VIII] are present.  He
I 1.0830-microns is dominant and He II lines are present.  [N I] is
identified, and the unidentified novae lines are weakly present.
The optical spectrum is faint, and only H_alpha, [O III], and [N
II] are prominent -- although other weaker features are present.

     Additional CCD V magnitudes (+/- 0.06) from W. Liller (cf.
IAUC 8635):  Dec. 4.071 UT, V = 11.96; 5.077, 12.03; 6.067, 11.88.

     Improved elliptical orbital elements from MPEC 2005-X24:

     T = 2005 Aug. 23.0791 TT         Peri. = 199.2400
     e = 0.530569                     Node  = 211.5687  2000.0
     q = 3.008609 AU                  Incl. =  16.7793
       a =  6.409057 AU    n = 0.0607453    P =  16.22 years

                      (C) Copyright 2005 CBAT
2005 December 6                (8641)            Daniel W. E. Green

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