[IAUC] IAUC 9186: BRIAN G. MARSDEN (1937-2010); COMET 103P/HARTLEY; C/2000 P4, C/2000 P5, C/2000 S8, C/2000 S9 [25139-2011/04-R1]

[quai en eps.harvard.edu]

                                                  Circular No. 9186
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBATIAU en EPS.HARVARD.EDU           ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


BRIAN G. MARSDEN (1937-2010)
     It is with deep regret that we must announce the death today
of Brian G. Marsden after a lengthy illness.  He will be remembered
as contributing much to celestial mechanics and the dynamics and
orbits of minor bodies of the solar system and as having an
encyclopedic knowledge of the history of astronomy.  He was a
dedicated servant to the astronomical community for many decades,
serving as Director of the Central Bureau from 1968 to 2000 (and as
Director Emeritus since then) and as Director of the Minor Planet
Center from 1978 to 2006 (and as Director Emeritus since then).  He
also served extensively within Commissions 6 and 20 of the IAU over
the years, being past President of both Commissions.  And he was
one of the most visible astronomers in the world over the years in
terms of his generous availability to the news media on behalf of
the astronomical community.


COMET 103P/HARTLEY
     Corrigendum.  On IAUC 9810, the text of the third sentence of
the third paragraph (Bonev et al. should be changed as follows:
"Preliminary production rates, rotational temperatures, and
abundance ratios (percent relative to water) are:  H_2O (20 lines),
(7.04 +/- 0.28) x 10**27 s**-1, 77 +/- 2 K, 100 percent; HCN (12
lines), 1.7 +/- 0.1 x 10**25 s**-1, 80 K (assumed), 0.24 +/- 0.017
percent; C_2H_6 (nu_5 and nu_7 bands), 4.2 +/- 0.32 x 10**25 s**-1,
75 K (assumed), 0.60 +/- 0.051 percent; CH_3OH (nu_2 and nu_9 bands),
14.0 +/- 2.0 x 10**25 s**-1, 75 K (assumed), 1.99 +/- 0.30 percent."
     Total-magnitude estimates:  Oct. 30.95 UT, 5.7, 15' coma (A.
Diepvens, Balen, Belgium, 20x50 binoc.); Nov. 4.14, 4.8, 45' (J. J.
Gonzalez, Leon, Spain, naked eye); 8.14, 5.7, 30' (T. Karhula,
Virsbo, Sweden, naked eye).


COMETS C/2000 P4, C/2000 P5, C/2000 S8, C/2000 S9 (SOHO)
     Further to IAUC 9185, additional Kreutz sungrazers have been
found on SOHO website images; K. Battams notes that C/2000 P5 and
C/2000 S8 were stellar in appearance, the others being slightly
diffuse; they all peaked at mag approximately 7.5 except for C/2000
S9 (mag approximately 7).

 Comet        2000 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2000 P4    Aug.  1.571    8 34.9  +16 38   C3    JR   2010-T37
 C/2000 P5          1.571    8 34.5  +16 42   C3    JR   2010-T37
 C/2000 S8    Sept.22.571   11 43.8  - 0 34   C3    JR   2010- T37
 C/2000 S9         29.888   12 11.2  - 3 24   C3    JR   2010- T37

                      (C) Copyright 2010 CBAT
2010 November 18               (9186)            Daniel W. E. Green