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IAUC 8591: 2005dp; Var STAR NEAR M27; 169P

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IAUC number

                                                  Circular No. 8591
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 2005dp IN NGC 5630
     S. Nakano, Sumoto, Japan, reports the discovery by Koichi
Itagaki (Teppo-cho, Yamagata, Japan) of an apparent supernova (red
mag 16.0) on unfiltered CCD images taken around Aug. 27.48 and
29.42 UT with a 0.60-m f/5.7 reflector.  The new object is located
at R.A. = 14h27m36s.62, Decl. = +41o15'15".0 (equinox 2000.0),
which is 1" west and 14" south of the center of NGC 5630.  Nothing
was visible at this location on images taken on 2002 May 2 and 2005
Aug. 5 (limiting mag 19.0).

     W. Renz, Karlsruhe, Germany, reports the CCD discovery of a
variable star situated in the outer portion of M27 by J. Hanisch
(Gescher, Germany) on unfiltered CCD images taken on about Aug.
18.0 UT (at mag about 15.8; position R.A. = 19h59m51s.29, Decl. =
+22o42'32".3, equinox 2000.0) and independently by H.-G. Lindberg
(Skultuna, Sweden) on an image taken on Aug. 18.9.  Renz also
forwards position end figures 51s.283, 32".13 obtained by D. Boyd
(Oxfordshire, U.K., 0.35-m reflector) from CCD frames taken on Aug.
21.92.  CCD magnitudes for the variable star (reported in part by
E. Waagen, AAVSO):  Aug. 16.937, 15.6 (N. Quinn, West Sussex, U.K.;
prediscovery; unfiltered); 21.916, V = 16.17 (Boyd); 21.917, I =
16.00 (Boyd); 21.935, V = 16.69 (D. Rodriguez, Madrid, Spain);
22.998, V = 16.16 (Boyd); 22.997, I_c = 15.82 (Boyd); 26.194-26.202,
R = 15.6 (J. E. McGaha, Tucson, AZ); 27.241, V = 15.6 (McGaha);
27.245, R = 15.8 (McGaha); 27.249, B = 14.9 (McGaha).  A. Henden,
AAVSO, writes that a likely progenitor with R_c about 22.5 has been
identified on co-added U.S. Naval Observatory images of M27 taken
in the early 1990s (limiting mag R_c about 26, but a difficult
measurement with the variable background and nearby brighter stars)
-- giving an amplitude of about 7 magnitudes, typical for a WZ-Sge-
type cataclysmic variable.  Renz and Henden add that 'superhump'
variations in brightness of about 0.3 mag with a period of about 82
min have been detected in photometric observations by T. Vanmunster
and B. Martin.

COMETS 169P/2002 EX$_{12}$ (NEAT), 170P/2005 M1 (CHRISTENSEN)
     Comet P/2002 EX_12 (cf. IAUC 8578; found in images dating back
to 1988) has been given the permanent numbering 169P, while comet
P/2005 M1 (cf. IAUC 8547; found in images dating back to 1997)
has been assigned the number 170P (MPC 54661).

                      (C) Copyright 2005 CBAT
2005 August 29                 (8591)            Daniel W. E. Green

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