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IAUC 8895: N Pup 2007; C/2007 Q8, C/2007 Q9,, C/2007 R6-R8

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IAUC number 

                                                  Circular No. 8895
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


NOVA PUPPIS 2007
     Alfredo Jose Serra Pereira, Carnaxide, Portugal, reports his
discovery of an apparent nova (mag 7.0) during his regular visual
patrol on Nov. 14.23 UT with 14x100 binoculars, the position given
as R.A. = 8h16m.2, Decl. = -34o15' (equinox 2000.0); he had nova-
hunted for 625.85 hr since his discovery of the 2001 nova V4740 Sgr
(cf. IAUC 7706).  Pereira adds that nothing was detected at this
position in his visual searches during Nov. 6.23, 7.22, 8.23, 10.23,
and 11.22 down to mag about 8; additional monitoring during Nov.
14.243-14.256 also yielded mag 7.0.  Following requests by the
Central Bureau, CCD astrometry for the variable has been reported
by J. E. McGaha (Tucson, AZ, U.S.A., 0.62-m f/5.1 reflector) and by
J. Young and H. Rhoades (Table Mountain 0.61-m f/16 Cassegrain
reflector).  From his 1-s exposure on Nov. 14.411, McGaha measures
R.A. = 8h16m18s.01, Decl. = -34o15'24".1, red mag 6.5 (USNO-A2.0
reference-star catalogue).  From four exposures "in surprisingly
good seeing for the low altitude" on Nov. 14.47-14.48, Young
measures average position end figures 17s.99, 25".0, mag 6.7 in a
red filter (USNO-B1.0 reference-star catalogue); Young also
estimated visual mag 6.4 at this time.  Young adds that comparison
with a red image from the Digitized Sky Survey shows only an
extremely faint star (mag about 20) at the same spot as the
apparent nova (located in a fairly empty area surrounded by "a
busy star field").


COMETS C/2007 Q8, C/2007 Q9, AND C/2007 R6-R8 (SOHO)
     Further to IAUC 8893, additional Kreutz-sungrazing comets have
been found on SOHO website images, their "discovery" observations
tabulated below.  C/2007 Q8, also found by R. Kracht, was bright
(mag about 4.5) and elongated.  C/2007 Q9, which was also clearly
visible in SECCHI HI-1B images for several hours, was also quite
bright (mag about 5.5) and slightly elongated.  C/2007 R6 was very
faint (mag about 8) and slightly diffuse.  C/2007 R7 and C/2007 R8
were stellar in appearance and faint (mag about 7) in C3 images;
C/2007 R7 appeared small, diffuse, and very faint in C2 images.

 Comet       2007 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2007 Q8   Aug. 28.596   10 05.2  + 8 30   C3     HS   2007-U35
 C/2007 Q9        28.988   10 07.2  + 8 26   C3     JS   2007-U35
 C/2007 R6   Sept. 1.075   10 31.5  + 8 00   C2     HS   2007-U35
 C/2007 R7         8.321   10 52.2  + 4 09   C3/2   HS   2007-U35
 C/2007 R8         9.863   10 53.8  + 4 32   C3     BZ   2007-U36

                      (C) Copyright 2007 CBAT
2007 November 14               (8895)            Daniel W. E. Green

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