[IAUC] IAUC 9219: P/2011 N1; 27P [25139-2011/04-R1]

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                                                  Circular No. 9219
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBATIAU en EPS.HARVARD.EDU           ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET P/2011 N1
     An apparently asteroidal object reported by Ignacio de la
Cueva, Ibiza, Spain (from exposures taken by J. L. Ortiz, P.
Santos-Sanz, N. Morales, and himself with a 0.40-m f/3.7 reflector
at San Pedro de Atacama, Chile; discovery observation tabulated
below) was found to show cometary appearance after initial posting
on the Minor Planet Center's 'NEOCP' webpage.  On July 3.4 and 4.4
UT, de la Cueva, Morales, and Ortiz obtained CCD images with a
0.45-m reflector at Cerro Burek (Chile) that show a tail extending
about 10" and 55" in the anti-solar direction, respectively (noting
also a central condensation of mag 18.5-18.7 but not mentioning
anything about a coma).  R. Holmes, Ashmore, IL, USA, reports that
co-added CCD images taken by T. Linder, V. Hoette, and himself with
a 0.41-m f/11 reflector on July 7.3 under poor sky conditions show
an elongated coma 5".8 in diameter with a very short, relatively
broad tail extending 10".8 in p.a. 288 deg.  N. Howes, G. Sostero,
and E. Guido remotely used the 2.0-m f/10 "Faulkes Telescope South"
at Haleakala to obtain 20-s Bessel-R-filtered exposures on July 7.7
that show an elliptical coma of size about 7" x 4", elongated
toward the west, with a sharp central condensation and a tail
nearly 10" long toward p.a. 270 deg.

     2011 UT             R.A. (2000) Decl.       Mag.
     July  1.35971    0 55 58.88   -37 06 27.3   19.9

     The available astrometry, the following preliminary orbital
elements by G. V. Williams, and an ephemeris appear on MPEC
2011-N29.

     T = 2012 May  30.0284 TT         Peri. = 330.2352
     e = 0.546276                     Node  =  77.9104  2000.0
     q = 2.876240 AU                  Incl. =  35.6939
       a =  6.339177 AU    n = 0.0617525    P =  15.96 years


COMET 27P/CROMMELIN
     Total-magnitude and coma-diameter estimates:  July 1.11 UT,
10.3, 3'.5 (J. J. Gonzalez, Leon, Spain, 0.20-m reflector; visual;
altitude 11 deg); 5.10, 10.1, 3' (Gonzalez; altitude 8 deg); 5.45,
12.0, 2' (H. Sato, Tokyo, Japan; remotely using a 0.25-m reflector
+ CCD at the RAS Observatory near Mayhill, NM, U.S.A.).

                      (C) Copyright 2011 CBAT
2011 July 7                    (9219)            Daniel W. E. Green