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IAUC 9161: P/2010 P3; P/2010 P4

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IAUC number 

                                                  Circular No. 9161
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 P/2010 P3 (SPAHR)
     G. Hug reports his recovery of comet P/1998 U4 (cf. IAUCs 7042,
7043) on CCD images obtained with a 0.56-m reflector located near
Scranton, KS, U.S.A. (astrometry tabulated below); in stacked
images, the object showed a possible faint broad tail at p.a.
roughly 260 deg, spanning 60 deg in p.a. and about 10"-12" long.

     2010 UT             R.A. (2000) Decl.       Mag.   Observer
     Aug. 14.40532    0 06 05.20   + 5 24 54.2   20.0   Hug
          14.41616    0 06 05.07   + 5 24 50.8   20.3    "
          14.42699    0 06 04.97   + 5 24 47.4   20.3    "
          16.29422    0 05 39.82   + 5 15 46.1   20.3    "
          16.31586    0 05 39.46   + 5 15 39.8   20.6    "
          16.32669    0 05 39.27   + 5 15 36.4   20.3    "

The indicated correction to the prediction by B. G. Marsden on MPC
65938 is Delta(T) = +0.04 day.  Linked orbital elements by G. V.
Williams (Epoch = 2012 Apr. 23.0 TT, T = 2012 Apr. 3.5900 TT, e =
0.278856, q = 3.979945 AU, Peri. = 247.6855 deg, Node = 180.7731
deg, i = 32.4828 deg, equinox 2000.0, P = 12.97 years), residuals,
and an ephemeris appear on MPEC 2010-Q05.


COMET P/2010 P4 (WISE)
     Amy Mainzer, Jet Propulsion Laboratory, reports the discovery
of a comet (discovery observation tabulated below) with a tail
extending at least about 150" toward the southwest in images
obtained with the WISE satellite.  Following posting on the 'NEOCP'
webpage, ground-based CCD astrometrists at three observatories have
failed to find cometary appearance, noting the object's magnitude
to be 21.3-21.9 during Aug. 11-16.

     2010 UT             R.A. (2000) Decl.       Observer
     Aug.  6.58975    2 37 56.10   +20 05 40.6   WISE

The following elliptical orbital elements by G. V. Williams and an
ephemeris appear on MPEC 2010-Q06.

     T = 2010 July  6.4827 TT         Peri. = 354.4274
     e = 0.514710                     Node  =   2.3361  2000.0
     q = 1.862466 AU                  Incl. =  24.1457
       a =  3.837837 AU    n = 0.1310914    P =   7.52 years

                      (C) Copyright 2010 CBAT
2010 August 16                 (9161)            Daniel W. E. Green

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