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IAUC 9053: EDITORIAL NOTICE; (136617) 1994 CC; C/2009 A6

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IAUC number 

                                                  Circular No. 9053
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


EDITORIAL NOTICE
     On MPC 66141, with little explanation, it was announced that
the Minor Planet Center will cease charging for its online
publications on 2009 Oct. 1.  The "Computer Service" (run since
1983 jointly by the Central Bureau and the MPC) will continue after
Oct. 1 as before for paying subscribers, giving access to IAUCs and
CBETs.


(136617) 1994 CC
     M. Brozovic and L. A. M. Benner, Jet Propulsion Laboratory
(JPL), California Institute of Technology (CIT); M. C. Nolan and E.
S. Howell, Arecibo Observatory; C. Magri, University of Maine at
Farmington; J. D. Giorgini, JPL; P. A. Taylor, Arecibo Observatory;
J. L. Margot, University of California, Los Angeles; M. W. Busch,
CIT; M. K. Shepard, Bloomsburg University; L. M. Carter,
Smithsonian Institution; J. S. Jao, J. Van Brimmer, C. R. Franck,
M. A. Silva, M. A. Kodis, D. T. Kelley, and M. A. Slade, JPL; A.
Bramson, University of Wisconsin; K. J. Lawrence, JPL; J. T.
Pollock, Appalachian State University; P. Pravec, Ondrejov
Observatory; and D. E. Reichart, K. M. Ivarsen, J. Haislip, M. C.
Nysewander, and A. P. LaCluyze, University of North Carolina,
Chapel Hill, report that Goldstone (8560-MHz, 3.5-cm) and Arecibo
(2380-MHz, 12.6-cm) delay-Doppler radar images obtained on June
12-15 reveal that minor planet (136617) is a triple system.
Visible range extents in 19-m-resolution Goldstone data from June
12 suggest preliminary diameter estimates of 650 m for the primary
and at least 50 m and 100 m for the satellites, whose orbital
separations from the primary were at least 0.5 km and 1.2 km.
Photometry obtained with the Panchromatic Robotic Optical
Monitoring and Polarimetry Telescopes (PROMPT) reveals a 0.05-mag-
deep attenuation centered on June 3.04 UT, suggesting a satellite
eclipse/occultation, and yields a lightcurve amplitude of 0.09 mag
and rotation period of 2.3886 +/- 0.0001 hr for the primary.


COMET C/2009 A6 (STEREO)
     Further to IAUC 9051, another slightly diffuse and somewhat
elongated Kreutz sungrazer has been found on STEREO/SECCHI HI-1A
images, reaching peak magnitude about 11.

 Comet        2009 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 A6    Jan. 2.378    22 11.1  -14 25   HI*    AW   2009-F31

                      (C) Copyright 2009 CBAT
2009 June 19                   (9053)            Daniel W. E. Green

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