2005 Nov 20

Home Up Fireball Image

 

Via the RMOBS forum, Chris Steyeart notified observers that Felix Verbelen and Patrick Vanouplines recorded a high number of long reflections during the morning hours (UT) of November 20.

There's an image of a fireball recorded by Ian McAdam on this night here (large file).

2005 Nov 20 00:46 UT Verbelen

Felix recorded the following large meteor echo starting at approximately 00:46UT.

2005 Nov 20 00:46 Vanouples

Patrick recorded the following large reflection, from the same meteor, at 01:46 local (00:46 UT).

2005 Nov 20 00:46 UT Smith

Andy Smith also recorded this event.

2005 Nov 20 00:46 UT Entwistle

I also recorded this event, with the reflection from the trail lasting for six minutes. My clock was approximately 1:30 slow.

2005 Nov 20 08:10 UT Entwistle

The flow of larger meteors resulting in longer trails continued throughout the night and into the morning. The following was recorded starting at 08:10UT. 

2005 Nov 20 09:19 UT Entwistle

The last large event was recorded at O9:19 UT. This trail persisted for almost five minutes. The geometry clearly wasn't ideal, as the the intensity of the reflections actually increase over time as the upper altitude winds distort parts of the trail into a more favourable alignment.

2005 Nov 20 09:19 UT Verbelen

Felix also recorded this same event from Belgium.

A comparison of the frequency-spread and echo duration of the two records suggests that Felix only saw the reflection from the ionization trail in the upper part of the atmosphere for this event. The longer duration reflection from the lower atmosphere is not seen in Felix's record. This is probably due to the geographical location of the meteor responsible for this trail.

Other reflections recorded at this time were also notable for their very high spread in frequency, presumably related to the Leonids very high entry velocity.

Details

Felix receives the VVS beacon on 49.990 MHz over a relatively short 120km baseline. The beacon is due West (278) of Felix's observatory.