Obs 17 Jan 2005 Part 1

From: Greg Roberts (grr@iafrica.com)
Date: Tue Jan 18 2005 - 11:02:35 EST

  • Next message: Leo Barhorst: "LB obs 2005 Jan 18"

    Observations 17 Jan 2005  Part 1
    -------------------------------------
    
    Cosatrak 1 (Computerised satellite Tracking System).
    MINTRON low light level CCD surveillance camera (0.005 lux typical
    in non integration mode) and 0.00005 lux in STARLIGHT mode with 128
    frame integration.
    Used with 200mm focal length f/3.5 lens giving a field of view of
    about 1.805 x 1.334 degrees and easily showing 12th magnitude stars.
    Found 48 frame integration gave best results, exposure about 1 second.
    
    Site 0433 : Longitude 18.51294 deg East, Latitude  33.94058 deg S,
    Elevation 10 metres - situated in Pinelands (Cape Town), South Africa
    
    Moon causing some problems when observing near it, however overhead I
    was able to identify magnitude 13.1 stars on the video recording.
    
    
    23937 96 029F   0433 F 20050117200507800 17 15 2215489-542449 39
    23937 96 029F   0433 F 20050117200859200 17 15 0344576-290121 39
    23937 96 029F   0433 F 20050117200928900 17 15 0421566-173226 39
    23937 96 029F   0433 F 20050117201000600 17 15 0455032-051044 39
    22638 93 026A   0433 F 20050117203531500 17 15 1302189-562835 39
    22638 93 026A   0433 F 20050117203612700 17 15 1222349-495723 39
    22638 93 026A   0433 F 20050117203702700 17 15 1147262-402141 39
    23947 96 038C   0433 F 20050117211116100 17 15 0216080-410027 39
    23947 96 038C   0433 F 20050117211136300 17 15 0220193-402803 39
    22519 92 086C   0433 F 20050117204359300 17 15 0032511-390354 39
    22519 92 086C   0433 F 20050117204516100 17 15 0038536-412112 39
    22519 92 086C   0433 F 20050117205046400 17 15 0107441-505138 39
    27168 02 001A   0433 F 20050117214304300 17 15 0540151+072312 39  +095 05
    27168 02 001A   0433 F 20050117215111000 17 15 0548228+072004 39  +095 05
    90028 04 846A   0433 F 20050117211944000 17 15 0209154-383727 39
    90028 04 846A   0433 F 20050117211947800 17 15 0212022-382005 39
    90028 04 846A   0433 F 20050117211950800 17 15 0214032-380852 39
    90028 04 846A   0433 F 20050117211953700 17 15 0216043-375632 39
    
    Notes:
    (1) The main purpose of the evening was to try and recover #90028
        which had not been seen my previous tracking session, and also
        to try and locate some of the geostationaries over my location
        that have not been observed for several years in some cases.
    
    (2) An orbit plane search was carried out for #90028, starting 20
        minutes early to 20 minutes after predicted time. An unidentified
        satellite was sighted running approximately 10 minutes late on
        predictions and is reported above as #90028. When my system operates
        in orbit plane scan mode I cannot run after a satellite and get
        more positions, so the positions above were obtained as it crossed
        the field of view. The angular velocity was about 8 arc minutes/sec
        which is about correct for the range of the satellite at the time.
    
    (3) Milstar 5 #27168 has not been seen for a long time. I had tried
        with my earlier system but nothing positive seen. This time there
        was a bright geostationary, a little off track but everything else
        seems okay. An Ariane debri object, #26850 ,was close to the area,
        but was not seen and moving at a lower altitude and steeper track
        angle so Im 99.9% confident this is MILSTAR 5 - very bright - around
        magnitude +9.5 and steady.
    
    (4) Lots of strays were seen. An interesting bright one - about magnitude
        8 steady was #26383 00-032B  CZ-3A R/B at 10335km range. This has
        i = 27,  P = 544m, and orbit 272 x 31148 kms. Whilst following it
        I observed a close grouping of 4 satellites which later were
        identified as HOTBIRD 1,2,4 and 6 ( geostationary satellites), at
        around magnitude 11.5 steady.
    
    (5) Other strays identified:
    
        #14051  83-041B  Delta 1 r/b at 2760 km range
        #24304  96-052A  Cosmos 2334 at 2270km range, about magnitude 9
        #28380  04-028A  Cosmos 2407 at 2008km range, magnitude 8
        #21965  92-027B  Delta 2 R/B at 2095km range, bright at about mag 7
        #22220  92-076B  SL-16 R/B at 2170km,bright about mag 6
        #27942  03-042D  UK-DMC fast, faint- about magnitude 10
        #20735  90-070A  Cosmos 2090, range 1956km, magnitude about 9
        #10758  76-077BF Delta 1 Deb, range 2172 km,magnitude about 10
        #10513  77-116B  SL-8 R/B, range 1919 km, magnitude about 9
        #07736  75-028A  Cosmos 726, range 2450km,magnitude about 9.5
    
    (6) To report still - tomorrow ( all being well!)
    
        #25017  Lacrosse 3
        #25744  USA 144
        #14690  Noss 6(a)
        #25725  Milstar 3 Cn Rkt
        #14728  Noss 6(c)
        #14795  Noss 6(f)
        #27938  USA 171 rkt
        #90013  Unknown geostationary
    
        plus a few more strays.
    
    (7) Not seen, but tried:
    
        #26053 USA 148 Rkt - next time Ill do a plane search for it.
        #90004 tried but difficult - low down through very small gap in tree.
        #90029 tried but below neighbours roof.
    
    Cheers
    Greg
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Tue Jan 18 2005 - 12:09:26 EST