[IAUC] IAUC 8721: 2006cx, 2006cy, 2006cz; C/2006 L2 [w/ 2006cz in MCG -01-38-2] [25139-2007/05-R1]

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                                                  Circular No. 8721
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
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Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVAE 2006cx, 2006cy, 2006cz
     Additional supernovae have been discovered on unfiltered CCD
images:  2006cx and 2006cz by R. R. Prasad, J. Schwehr, and W. Li
(LOSS/KAIT; cf. IAUC 8720), and 2006cy by R. Quimby and P. Mondol
(cf. IAUC 8622).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006cx  June  8.46  22 35 56.45  +20 19 17.1  17.4  1".6 E, 3".5 S
2006cy  June  9.22  13 08 01.23  +26 06 59.0  17.2  2".3 E, 13".1 S
2006cz  June 14.29  14 48 36.66  - 4 44 30.7  17.4  0".8 E, 19".8 S

Additional KAIT magnitudes for 2006cx in NGC 7316:  2005 Dec. 6.15
UT, [19.0; 2006 June 9.47, 17.5.  SN 2006cx is a type-II supernova
(details on CBET 543).  SN 2006cy, which was found by subtracting a
co-addition of 0.45-m ROTSE-IIIb telescope images taken between
2004 Dec. 15 and 2006 Jan. 10 (limiting mag about 19.3) from the
2006 June images, is a type-IIn supernova (details on CBET 544).
Additional magnitudes for 2006cz in MCG -01-38-2:  May 24.30, [19.1;
June 2.31, [18.7; 15.23, 17.3.


COMET C/2006 L2 (McNAUGHT)
     R. H. McNaught reports his discovery of comet with a 40" coma
and a 1'.5 tail in p.a. 135 deg on CCD images taken with the 0.5-m
Uppsala Schmidt telescope in the course of the Siding Spring Survey
(discovery observation tabulated below).  Following posting on the
'NEO Confirmation Page', J. E. McGaha (Tucson, 0.36-m f/10 Schmidt-
Cassegrain reflector) writes that seven stacked 30-s CCD images
obtained around June 15.15 UT show a bright, stellar nuclear
condensation and a coma of diameter 25" elongated in p.a. 140 deg;
subsequent images by McGaha around June 15.199-15.205 showed that
the brightness was changing by about 1 mag in only 10 min.  G. Hug
and D. Tibbets (Eskridge, KS, 0.7-m reflector) report that their
images from June 15.1 show the object to be diffuse.  A visual
observation by A. Hale (Cloudcroft, NM, 0.41-m reflector) on June
15.19 revealed a 0'.7 diffuse coma of total mag 13.5.

     2006 UT             R.A. (2000) Decl.       Mag.
     June 14.52128   14 41 31.41   -38 13 05.3   13.7

The available astrometry, preliminary parabolic orbital elements (T
= 2006 Nov. 22.076 TT, Peri. = 51.353 deg, Node = 239.705 deg, i =
99.708 deg, equinox 2000.0, q = 1.90990 AU), and an ephemeris
appear on MPEC 2006-L63.

                      (C) Copyright 2006 CBAT
2006 June 15                   (8721)            Daniel W. E. Green