[IAUC] IAUC 9054: V2468 Cyg; C/2009 B6, 2009 B7, 2009 C1,, 2009 C2; (3200) [25139-2009/08-R1]

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                                                  Circular No. 9054
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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V2468 CYGNI
     M. L. Sitko, Space Science Institute; and D. K. Lynch, The
Aerospace Corporation, report on 0.8- to 2.4-micron spectroscopy of
V2468 Cyg (cf. IAUCs 8936, 8998) on June 18 UT using SpeX at the
Infrared Telescope Facility.  The object continues to develop in
its coronal phase, showing lines of [Si VIII] 0.9913-micron, [Fe
VI] 1.2330-micron, [Fe VI] 1.2674-micron, [Si VI] 1.964-micron, [Al
IX] 2.0444-micron, [Ca VIII] 2.32-micron, and possibly [Ti VI]
1.7155-micron and [P VIII] 1.7356-micron.  Many He II lines are
also present.  Rydberg lines at 0.8926, 1.1114, 1.5545, and 2.103
microns are also present (Lynch et al. 2008, Bull. AAS 40, 531).
These lines generally have FWHM about 2000 km/s, and there is no
indication of dust formation.


COMETS C/2009 B6, 2009 B7, 2009 C1, AND 2009 C2 (STEREO)
     Further to IAUCs 9053, additional small and slightly diffuse
Kreutz sungrazers have been found on STEREO/SECCHI HI-1A images.
Very approximate peak magnitudes from K. Battams:  C/2009 B6 and
C/2009 B7, 11; C/2009 C1, 11-12; C/2009 C2, 10.

 Comet        2009 UT        R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 B6    Jan. 19.683    23 21.2  - 8 10   HI*    RM   2009-M37
 C/2009 B7         29.739    23 57.1  - 3 43   HI*    RM   2009-M37
 C/2009 C1    Feb. 10.044     0 37.9  + 0 46   HI*    RK   2009-M37
 C/2009 C2         11.822     0 51.3  + 1 05   HI*    KB   2009-M37


(3200) PHAETHON
     K. Battams, Naval Research Laboratory, also writes that A.
Watson (Werribee, Victoria, Australia) has commented that the minor
planet (3200) was visible in SECCHI HI-1A images during June 17-22,
noting a very short radial elongation (perpendicular to the
direction of motion) that was possibly a line-of-sight effect
related to its passage through a reasonably dense, higher-speed
solar outflow stream.  Battams adds that the apparent brightness of
(3200) increased significantly (about 2 mag or more), peaking at
mag perhaps 10-11 a few hours after perihelion (T = June 20.302 TT,
q = 0.140 AU); 36 hr later, the object's had faded to magnitude
roughly 13-14.  Phaethon was also visible in HI-1B images during
June 21-22.  More formal photometry will be performed later.

                      (C) Copyright 2009 CBAT
2009 June 29                   (9054)            Daniel W. E. Green