Electronic Telegram No. 4031
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET C/2014 W11 (PANSTARRS)
     R. J. Wainscoat reports the discovery of a comet in four w-band CCD
exposures taken with the 1.8-m Pan-STARRS1 telescope at Haleakala on Nov. 26
(discovery observations tabulated below); the object has an extended point-
spread function and shows a tail towards position angle 300 degrees extending
for approximately 6" in stacked images.

     2014 UT             R.A. (2000) Decl.       Mag.
     Nov. 26.54570    9 19 17.57   +13 41 59.3   18.6
          26.55695    9 19 17.79   +13 41 56.1   18.5
          26.56821    9 19 18.02   +13 41 53.0   18.6
          26.57943    9 19 18.24   +13 41 49.8   18.6

After the object was posted on the Minor Planet Center's PCCP webpage. H.
Sato, Tokyo, Japan, obtained eight stacked 60-s exposures with an iTelescope
0.51-m f/6.8 astrograph (+ luminance filter) near Mayhill, NM, USA, on Nov.
28.5 UT that show the comet to be strongly condensed with a coma 8" in
diameter (w-band magnitude 18.2 as measured within a circular aperture of
radius 6".5) and no tail.
     The available astrometry (including pre-discovery observations identified
by T. Spahr in MPC data from Mt. Lemmon on Nov. 3.5 and 19.5 UT, with the
comet then reported at mag 19.1-19.2 and 18.3-18.7, respectively; from the
ISON/Kislovodsk Observatory in Russia on Nov. 20.0; and from Catalina on Nov.
26.5, when the mag was reported as 18.0-18.2), the following elliptical
orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2014-X32.

                    Epoch = 2015 June 27.0 TT
     T = 2015 June 18.0230 TT         Peri. = 225.7988
     e = 0.649267                     Node  = 295.9344  2000.0
     q = 3.423535 AU                  Incl. =  12.7078
       a =  9.761099 AU    n = 0.0323189    P =  30.5 years


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 December 5                  (CBET 4031)              Daniel W. E. Green