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IAUC 9147: C/2010 J4; C/2010 E5; P/2010 D2

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IAUC number 

                                                  Circular No. 9147
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  D. W. E. Green, Room 209; Department of
 Earth and Planetary Sciences; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBAT@IAU.ORG; CBATIAU@EPS.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304


COMET C/2010 J4 (WISE)
     A. Mainzer, Jet Propulsion Laboratory, reports the discovery
of a comet with a tail about 400" long in p.a. 141 deg on exposures
taken in all four wavelength bands (3.4, 4.6, 12, and 22 microns)
by the Wide-field Infrared Survey Explorer (WISE) spacecraft; she
notes this to be the brightest of the comets discovered by WISE,
with a signal-to-noise ratio four times larger than that of P/2010
B2 (cf. IAUC 9115).  After posting on the Minor Planet Center's
'NEOCP' webpage, D. Balam reports that a 15-min stacked exposure
taken on May 13.224 UT with the 1.82-m Plaskett telescope (+ Gunn r
filter) of the National Research Council of Canada reveals a well-
condensed nuclear condensation and a fan-shaped tail extending 50"
in p.a. 141 deg.  P. Holvorcem writes that three co-added 300-s
exposures taken with the 0.81-m telescope at Tenagra Observatory
around May 13.29 shows a coma about 6" in diameter (mag 19.1-19.2)
and a straight, 25" tail toward p.a. 133 deg.

     2010 UT             R.A. (2000) Decl.       Observer
     May  12.24491   13 00 45.84   +65 19 03.2   WISE

     The available astrometry, the following preliminary parabolic
orbital elements by B. G. Marsden, and an ephemeris appear on MPEC
2010-J91.

     T = 2010 May   3.289 TT          Peri. =  84.477
                                      Node  = 316.997   2000.0
     q = 1.08599 AU                   Incl. = 162.260


COMET C/2010 E5 (SCOTTI)
     Elliptical orbital elements for this comet (cf. IAUC 9127) by
B. G. Marsden, from MPEC 2010-J83:

                    Epoch = 2009 Nov. 25.0 TT
     T = 2009 Nov. 21.1344 TT         Peri. = 147.8067
     e = 0.843174                     Node  =  17.0820  2000.0
     q = 3.888397 AU                  Incl. =  18.9155
       a = 24.794317 AU    n = 0.0079832    P = 123.5 years


COMET P/2010 D2 (WISE)
     Elliptical orbital elements for this comet (cf. IAUC 9121),
from MPEC 2010-G65:  T = 2010 Mar. 4.3760 TT, q = 3.659931 AU, e =
0.454088, Peri. = 119.9462 deg, Node = 319.8111 deg, i = 57.1882
deg (equinox 2000.0), P = 17.4 years.

                      (C) Copyright 2010 CBAT
2010 May 13                    (9147)            Daniel W. E. Green

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