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IAUC 8597: P/2005 R2; P/2004 FY_140

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IAUC number 

                                                  Circular No. 8597
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET P/2005 R2 (VAN NESS)
     M. E. Van Ness, Lowell Observatory, reports his discovery of a
comet on images taken by himself with the LONEOS telescope
(discovery observation tabulated below); the new object shows a
moderately condensed elongated coma of diameter 20" with a fan-
shaped tail 245" long in p.a. 240 deg.  Following posting on the
'NEO Confirmation Page', several other observers have noted the
object's cometary nature on their CCD images -- including D.
Kyrylenko, O. Gerashchenko, V. Lokot, and Y. Ivashchenko (Zhytomyr
reg, Ukraine, Sept. 10.8 UT; 2' tail in p.a. 250 deg); E. Reina
Lorenz (Masquefa, Spain, Sept. 11.0; 50" coma and 100" tail); C.
Jacques and E. Pimentel (Belo Horizonte, Minas Gerais, Brazil,
Sept. 11.25; elongated coma of diameter 9" x 12" and red mag
15.8-16.1 with a broad 50" fan tail in p.a. 240 deg); and J. E.
McGaha (Tucson, AZ, Sept. 11.27-11.29; six 60-s co-added images
show a 12" x 18" coma elongated with a narrow, fan-shaped tail 115"
long in in p.a. 236 deg).

     2005 UT             R.A. (2000) Decl.       Mag.
     Sept.10.40969    2 26 37.95   +28 36 18.9   17.0

The available astrometry (including prediscovery LINEAR
observations on Aug. 16 and 31), the following orbital elements,
and an ephemeris appear on MPEC 2005-R54.

     T = 2005 Feb. 11.022 TT          Peri. =   3.215
     e = 0.38393                      Node  = 312.836   2000.0
     q = 2.12818 AU                   Incl. =  10.246
       a =  3.45442 AU     n = 0.153512     P =   6.42 years


COMET P/2004 FY_140 (LINEAR)
     An apparently asteroidal object discovery by LINEAR (discovery
observation below, from MPS 104067; orbital elements on MPO 66354)
has been found by C. Hergenrother, Lunar and Planetary Laboratory,
to have been consistently non-stellar on individual and co-added
R-band frames taken on 2004 May 19 and 20 UT; images taken on 2005
July 5 and 6 with the Catalina 1.54-m reflector failed to show the
object for 15' along the line-of-variation (limiting mag V about
22; predicted mag near V about 19).

     2004 UT             R.A. (2000) Decl.       Mag.
     Mar. 27.33098   12 37 49.21   - 6 08 44.6   18.1

                      (C) Copyright 2005 CBAT
2005 September 11              (8597)            Daniel W. E. Green

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