Re: Progress R/B decay also seen from Crete?

From: Firat Barlas (firat@macrolimit.com)
Date: Wed Sep 03 2003 - 08:39:04 EDT

  • Next message: Ted Molczan: "USA 144 - change in optical characteristics"

    I think atmopheric entry started over Crete island because I saw the
    fireball at 30 degree elevation at Bursa.
    
    I have a question :  Have anybody heared sound of a reentry? (except
    shuttle) I hear 3 or 4 boom sound 7 or 8 minutes after reentry.
    
    If we think that velocity of the sound = 300 m/sec (because of low density
    in upper atmosphere)
    between  420 - 480 seconds
    Distance = 126 - 144 kms
    
    That's a very realistic result. (100 kms altimeter at 30 degrees elevation)
    
    Firat Barlas
    
    
    
    
    Hi Firat, Harro, Alan & others,
    
    Through his website, our member Daniel van Os received a report of a very
    slow bright fireball seen on 31 August 2003, ~5:30 local time (UTC+3), from
    Crete. It reportedly moved from the west to the east, very slow, 15 to 20
    seconds visibility.
    
    Although the time reported is off by 15 minutes (but as often with chance
    sightings might perhaps be a rough approximation only) I think this might
    well be another sighting of the 2003-039B (#27874) Soyuz-Progress RB
    decay given the reported long visibility and general close proximity,
    although not perfect match, of the reported time.
    
    If true, this might suggest that the decay started over Crete/the Aegaean as
    Firat has suggested (as for an observer in Crete the R/B would only emerge
    from the earth shadow at less than 5 degrees altitude in the northeast while
    descending to the horizon, this Crete observation certainly would indicate
    an observation of the fireball phase of the decay).
    
    I am trying to see whether I can get a bit more details on this possible
    observation. So far I only have a very brief second hand account on this
    sighting by Daniel communicated by him on our DMS mailing list this morning.
    
    - Marco
    
    ----------
    Marco Langbroek
    Dutch Meteor Society (DMS)
    
    -----------------------------------------------------------------
    To unsubscribe from SeeSat-L, send a message with 'unsubscribe'
    in the SUBJECT to SeeSat-L-request@satobs.org
    List archived at http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Thu Sep 04 2003 - 10:39:14 EDT