[IAUC] CBET 732: 20061110 : (22) KALLIOPE AND (22) KALLIOPE I

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                                                  Electronic Telegram No. 732
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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(22) KALLIOPE AND (22) KALLIOPE I
     M. Soma, National Astronomical Observatory of Japan, Mitaka,
Tokyo; and T. Hayamizu, Sendai Space Hall, Satsuma-sendai, Kagoshima,
Japan, report that the occultations by minor planet (22) Kalliope and
its satellite Linus (cf. IAUCs 7703, 8177, 8338) by the Tycho-catalogue
star 1886-01206-1 (R.A. = 6h17m54s.067, Decl. = +27d11'49".12, equinox
2000.0; V = 9.1) were observed in Japan at around 2006 Nov. 7.826 UT.
Positive observations of the occultations of each object have been
reported thus far by eight observers, and the observations are
consistent with each other.  The angular distance between Kalliope and
Linus was 0".26 in p.a. 313 degrees at the time of the occultation.
The occultation by Linus was predicted by J. Berthier, IMCCE, whose
prediction was forwarded by J. Lecacheux some 19 hours before the event,
and it turned out that the prediction was accurate to within about 100
km.  The derived diameter for Kalliope is 190 x 125 km (with the major
axis in p.a. 0 deg), and that for Linus is 30 km.  This is the first
successful observation of an occultation by a satellite of a minor
planet that was discovered previously by other means.  A diagram of the
observations is at URL
http://uchukan.satsumasendai.jp/data/occult/0611Kalliope-red-E.gif.


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                         (C) Copyright 2006 CBAT
2006 November 10                 (CBET 732)               Daniel W. E. Green