Sunday, February 13, 2011

New Comet: C/2011 C1 (McNAUGHT)

IAUC nr.9197, issued on 2011, Feb. 12, announced the discovery of a new comet (discovery magnitude 17) by R. H. McNaught through the 0.5-m Uppsala Schmidt telescope at Siding Spring, on images obtained on 2011, Feb. 10.7. The new comet has been designated C/2011 C1 (McNAUGHT).

After posting on the Minor Planet Center's 'NEOCP' webpage, other CCD astrometrists have also commented on the object's cometary appearance. We performed some follow-up measurements of this object while it was still listed in the NEO-CP, on 2011 Feb. 11.5, remotely from the GRAS Observatory (near Mayhill, NM) through a 0.25-m, f/3.4 reflector + CCD.

Our confirmation image shows a diffused coma nearly 20-arcsec in diameter, and a broad tail about 30-arcsec long toward PA 275.

Our confirming image (click for a bigger version):

MPEC 2011-C79 assignes the following preliminary parabolic orbital elements to comet C/2011 C1: T = 2011 Apr. 17.953 TT Peri. = 84.440; q = 0.88341 AU; Incl. = 16.831

According to COCD webpage, this is the 58th comet discovery for McNaught!!

by Ernesto Guido & Giovanni Sostero

1 comment:

Anonymous said...

well-done. cheers V.