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Fireball
by Simon at 19:27 10/03/09 (Blogs::Simon)
Out walking the dog at about 6:45 this evening, I saw a very bright fireball appear from behind the clouds above and to the east of Venus, descending towards the southwest and growing into an enormous brilliant white object almost as large as the moon before fading out about 6° above the horizon.

Anyone else notice it?

Report submitted to Society for Popular Astronomy Meteor Section:

Site Location:
Town: Figheldean
County: Wiltshire
Country: UK
Latitude: 51 ° 13 ’ ” N
Longitude: 1 ° 48 ’ ” W

Date / Time:
Date: 2009 - 03 - 10
Time (UTC): 18 h 45 m s

Start of fireball’s track:
30 ° altitude, 260 ° azimuth
h m s RA ° Dec.

End of fireball’s track:
6 ° altitude, 235 ° azimuth
h m s RA ° Dec.

Apparent speed: 3

Train Details: No visible train

Sounds: No sounds

Fragmentation: No fragmentation

Colours: Brilliant white

Magnitude Estimate: -12

Additional comments: Appeared in twilight from behind clouds to the east and above Venus and expanded to a ~20' diameter brilliant white circular fireball before fading out. No obvious train or fragmentation. Much brighter than any Iridium flare I've seen, perhaps as bright as the full Moon though slightly smaller maximum diameter of fireball. Track start and end point are estimated - twilight meant only Venus was visible in that region of the sky.
--
simon

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Fireball Simon - 19:27 10/03/09
- Deleted User Account - 21:52 11/03/09
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Re: Fireball Simon - 09:59 12/03/09
Almost certainly was Venus - it's actually north of west in late evening and sets almost exactly WNW at the moment.

Through bins, I'm guessing what you saw was the very thin crescent of Venus badly distorted :-)
--
simon

Re: Fireball report - reply from SPA Simon - 13:02 14/03/09
Nice of them to send me an update, here it is:

Yours is one of eleven observations of this object I've received so far, the others made from sites scattered across southern England and south Wales, east as far as Hertfordshire, north to Warwickshire, and west as far as Rhondda Cynon Taf and the south coast of mid Devon. Most of the witnesses were on the road at the time, so regrettably positional information on the object's flight is very sketchy. My preliminary analysis suggests the start may have been somewhere high above the upper Severn estuary, around Herefordshire-Worcestershire-Gloucestershire perhaps, and the fireball likely flew from there at an angle between north-south to northeast-southwest, possibly ending above Devon-Cornwall, but more likely out over the Channel west of Start Point. The end especially is little more than a best-guess, however. It seems to have been quite swift-moving, so it is most unlikely any meteorites will have survived. Two observers reported the object fragmented in mid-flight, but the majority - like yourself - saw no such break-up, possibly because of different viewing angles to the trail. Various striking colours were noted by different people, commonly blue, green and white in the head and red, orange or yellow in the tail, and it may have left a short-lived persistent train. Some of the early sightings and comments can be found on the SPA's Observing Forum, at:

http://www.popastro.com/phpBB2/viewtopic.php?t=11440

--
simon