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New Comet: C/2010 J3 (MCMILLAN)

13 May 2010, 17:56 UTC
New Comet: C/2010 J3 (MCMILLAN)
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IAU circular No. 9146, issued on 2010, May 13, announces the discovery by R. S. McMillan of a new comet on May 12, 2010, with the Spacewatch 0.9-m f/3 reflector at Kitt Peak. After posting on the Minor Planet Center's NEOCP webpage, many observers have commented on the cometary appearance of this 17.5 magnitude object, designated C/2010 J3 (MCMILLAN).We have been able to confirm this object remotely, through a 0.18-m refractor, f/7.3 + CCD at Tzec Maun Observatory near Mayhill, NM, U.S.A.: on 2010, May 12.4, co-adding of 10 unfiltered exposures, 180-seconds each, show a compact coma about 12" in diameter, with a sharp central condensation; broad tail nearly 20" long toward PA 265 deg.Our confirming image: Please click here for a bigger version:http://bit.ly/cdD6nmThe first and preliminary parabolic orbit for comet C/2010 J3 (MCMILLAN) indicates perihelion Sept. 28, 2010, at about 2.2 AU.by G. Sostero, E. Guido, L. Donato, V. Gonano

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