[IAUC] IAUC 9051: COMET 221P/2009 L1 (LINEAR); C/2008 E10, C/2008 Y16,, C/2008 Y17 [25139-2009/08-R1]

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                                                  Circular No. 9051
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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COMET 221P/2009 L1 (LINEAR)
     L. Elenin, Lyubertsy (Moscow region), Russia, reports the
recovery of comet P/2002 JN_16 (cf. IAUC 7907) on CCD images
obtained remotely with a 0.36-m f/3.8 Maksutov-Newtonian telescope
near Mayhill, NM, USA (first observation tabulated below).  The
recovery was confirmed by M. Schwartz with a 0.81-m f/7 reflector
near Rio Rico, AZ, USA, whose images clearly show a tail of length
about 35" in p.a. 248 deg.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     June  1.39819   23 26 08.23   + 8 37 27.6   20.5   Elenin

The correction to the predictions on MPC 56802 and in the 2008/2009
Comet Handbook is Delta(T) = -0.2 day.  Additional information, the
available astrometry, the following revised orbital elements,
residuals, and an ephemeris appear on CBET 1831.  The permanent
number 221P has been assigned to this comet (cf. MPC 66145).

                    Epoch = 2009 Jan.  9.0 TT
     T = 2009 Jan. 24.88878 TT        Peri. =  39.69673
     e = 0.4872673                    Node  = 230.03375 2000.0
     q = 1.7836977 AU                 Incl. =  11.41862
       a =  3.4788059 AU   n = 0.15190035   P =   6.49 years


COMETS C/2008 E10, C/2008 Y16, AND C/2008 Y17 (STEREO)
     Further to IAUCs 9025 and 9036, additional slightly diffuse
and somewhat elongated Kreutz sungrazers have been found on STEREO/
SECCHI HI-1A images (the elongation is partly due to the long
exposure times, about 40 min).  Approximate peak magnitudes:
C/2008 E10, 11-12; C/2008 Y16, 10-11; C/2008 Y17, 10.  K. Battams
notes that Kreutz comets in the HI-1 images generally initially
appear out of the background noise at mag about 13.5, and they are
still in the process of brightening as they leave the field-of-view;
he adds that their rates of initial brightening varies -- some
making very abrupt appearances, while others gradually come into
view.

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 E10   Mar.  7.850    1 01.8  + 2 32   HI*    AW   2009-F31
 C/2008 Y16   Dec. 31.794   22 05.1  -15 04   HI*    AW   2009-F31
 C/2008 Y17   Dec. 31.905   22 07.4  -15 32   HI*    KB   2009-F31

                      (C) Copyright 2009 CBAT
2009 June 7                    (9051)            Daniel W. E. Green