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IAUC 8689: (42355) 2002 CR_46; (60458) 2000 CM_114; 2005my, 2006O, 2006C, 2006J, 2006Y, 2006ai, 2006ao

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IAUC number 

                                                  Circular No. 8689
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


(42355) 2002 CR_46
     K. S. Noll, Space Telescope Science Institute; W. M. Grundy,
Lowell Observatory; D. C. Stephens, Johns Hopkins University; and
H. F. Levison, Southwest Research Institute, report the detection
of a binary companion to this centaur-type object (MPECs 2002-C84,
2002-H53; MPS 50182) when at 16.68 AU from the earth on Jan. 20.410-
20.426 UT with the High Resolution Camera (+ clear filter) of the
Advanced Camera for Surveys (HRC/ACS) on the Hubble Space Telescope
as part of an ongoing observing program.  The minor planet was
observed with one 300-sec exposure at each of four dithered
positions on the detector.  Two components are clearly resolved in
each image and in the co-added image.  The fainter component is
approximately 1.2 magnitudes fainter than the brighter of the two.
The two components are separated in the images by an angular
distance of 0".11 +/- 0".01, with the fainter component at p.a. 226
degrees as measured from the primary.  The spacecraft tracked the
motion of (42355) as it moved at an average rate of 0".085/min; the
relative position of the two components remained the same during
the orbit.  The projected separation of the objects in the plane of
the sky is 1330 +/- 130 km.


(60458) 2000 CM_114
     K. S. Noll, W. M. Grundy, H. F. Levison, and D. C. Stephens
also report the detection of a binary companion to this
transneptunian minor planet (MPEC 2000-J45, 2002-D20; MPO 44436),
obtained as above on Jan. 16.276-16.292 UT, when it was more than
41 AU from the earth.  Two components are clearly resolved in each
image and in the co-added image.  The two components are separated
in the images by an angular distance of 0".073 +/- 0".006 with the
fainter component at a position angle of 155.2 degrees as measured
from the primary.  The projected separation of the objects in the
plane of the sky is 2200 +/- 200 km.  The fainter component is
approximately 0.5 magnitude fainter than the brighter of the two.
The spacecraft tracked the motion of (60458) as it moved at an
average rate of 0".047/min; the relative position of the two
components remained the same throughout the orbit.


SUPERNOVAE 2005my, 2006O, 2006C, 2006J, 2006Y, 2006ai, 2006ao
     Supernovae 2005my (cf. IAUC 8655), 2006O (IAUC 8662), 2006C
(IAUC 8657), 2006J (IAUC 8661), 2006Y (IAUC 8668), 2006ai (IAUC
8674), and 2006ao (IAUC 8681) all appear to be type-II supernovae;
details appear on CBETs 358, 378, 380, 417, and 422.

                      (C) Copyright 2006 CBAT
2006 March 18                  (8689)            Daniel W. E. Green

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