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                                                  Circular No. 8994
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION


2008 TC_3
     J. Borovicka, Astronomical Institute, Czech Academy of
Sciences, reports that Z. Charvat (Czech Hydrometeorological
Institute) has noticed a bright spot that likely corresponds to the
atmospheric entry of 2008 TC_3 (cf. IAUC 8990) over northern Sudan
on images taken by the weather satellite Meteosat 8 around Oct.
7d02h45m UT; the spot is apparent in all twelve satellite spectral
channels, spanning wavelengths 0.5-14 microns.  Since the satellite
takes images in scanning mode, it takes about 5 min to obtain one
image; consequently, the exact time of the spot´s appearance cannot
be inferred easily from the image.  The spot is, however, not
present in the images taken at nominal times 2h40m and 2h50m UT.
The geographical coordinates of the spot in the visual and near-
infrared channels are long. = 32.16 deg east, lat. = +20.97 deg
(assuming that the source of light is at sea level).  The HRV
channel shows an apparent tail about 3 km long toward the west-
northwest.  The infrared channels (displaced in the instrument
focal plane and likely scanned the region 1.8 s later) show the
spot at long. = 32.37 deg east, lat. = +20.89 deg.  The actual
coordinates may be slightly southwest of these positions after
correcting for the fireball´s altitude (about 30 and 22 km).


--
Fidusz (FIDRICH Robert)
drotlevel:fidusz@zpok.hu
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