Red Dot observations 06 April 2007

From: Greg Roberts (grr@telkomsa.net)
Date: Sat Apr 07 2007 - 08:40:21 EDT

  • Next message: Leo Barhorst: "LB obs 2007 Mar 15, 22, 26"

    Subject:  "Red Dot" Observations in the Southern Hemisphere
    
    
    This is part of the Southern hemisphere geostationary flare
    program of Jeff Umbarger. His assistance and advice has
    been invaluable as well as the contributions from Bjorn Gimle
    and Rod Austin. I propose to observe every night until the
    "flare" season has passed.
    
    Equipment: CoSaTrak 1 200mm f/3.5.8 lens with MINTRON
    surveillance camera integrating for 128 frames (=2.56s
    exposure). Mount tracking on shadow entry point ( approx
    RA12h50m Dec +05deg. Field of view of camera 1.76 x 1.39
    degrees, star limit magnitude approx +12.5 mag.
    on 04 April 2007.
    
    06 April 2007
    --------------------
    
    SatName       Cat No. Time(UT)    RA (J2000) Dec    Notes
    ------------ ------- --------- -------------------- -----        
    
    Insat 4A      #28911 18h08m00s 13h05m35s +05d03'58"  1
    Insat 3B      #26108 18h08m37s 13h05m47s +05d08'05"  1
    Express AM2   #28629 18h20m21s 13h05m34s +05d03'41"
    Thaicom 5     #29163 18h26m15s 13h05m04s +05d04'07"   
    Telstar 10    #25010 18h33m47s 13h04m02s +05d10'38"  2
    LMI 1         #25924 18h39m55s 13h03m53s +05d09'21"
    Insat 3C      #27298 18h44m37s 13h04m28s +05d13'31"
    Kalpana 1     #27525 18h44m55s 13h04m47s +05d11'58"  3
    ESA 96065     ------ 18h49m05s 13h02m35s +04d47'04"  4
    Intelsat 4    #23636 18h53m01s 13h04m18s +05d11'58"
    Eutelsat W5   #27554 18h58m35s 13h03m17s +05d12'03"
    Cosmos 1366   #13177 18h59m46s 13h00m01s +05d39'54"  5
    Intelsat 7    #25473 19h05m49s 13h02m44s +05d12'49"
    Intelsat 10   #26766 19h06m22s 13h02m35s +05d14'41"
    Intelsat 704  #23461 19h16m00s 13h01m30s +05d14'21"
    Inmarsat 3F1  #23839 19h24m02s 13h02m51s +05d23'39"
    Intelsat 906  #27513 19h24m35s 13h01m59s +05d14'49"  6
    Intelsat 902  #26900 19h32m36s 13h00m48s +05d15'47"
    ESA96106      ------ 19h40m42s 13h00m06s +05d13'37"  7
    Intelsat 904  #27380 19h40m52s 13h00m17s +05d18'26"
    NSS 703       #23305 19h52m42s 12h59m05s +05d20'53"
    Bonum 1       #25546 19h56m24s 12h58m05s +05d21'07"  8
    Insat 3E      #27951 20h00m18s 12h57m54s +05d21'56"
    Intelsat 702  #23124 20h01m17s 12h58m06s +05d19'44"
    Express AM22  #28134 20h08m43s 12h57m30s +05d21'18"
    Intelsat 706  #23571 20h19m44s 12h56m14s +05d21'46"
    Yamal 202     #28089 20h24m43s 12h55m27s +05d20'54"
    GSAT 2        #27807 20h28m14s 12h54m39s +05d24'53"
    Syracuse 3A   #28885 20h32m50s 12h54m52s +05d24'08"
    Intelsat 12   #26590 20h40m54s 12h53m54s +05d23'34"
    ESA 96074     ------ 20h44m29s 12h53m03s +05d25'07"  9
    Turksat 2A    #26666 20h52m28s 12h52m09s +05d22'49"
    Turksat 1C    #23949 20h52m56s 12h52m21s +05d30'29"
    Express AM1   #28463 21h01m11s 12h51m48s +05d28'53"
    Hellas-Sat2   #27811 21h04m31s 12h50m36s +05d26'02"
    Anatolia 1    #23779 21h08m41s 12h50m15s +05d30'37" 10
    Eutelsat W4   #26369 21h16m26s 12h49m20s +05d27'28"
    Sesat         #26243 21h16m28s 12h48m42s +05d23'56"
    E-Bird        #27948 21h27m46s 12h47m20s +05d27'26"
    Intelsat 802  #24846 21h29m15s 12h47m40s +05d32'08"
    
    
    
    
    
    
    Notes:
    -------------
    1. Three satellites in a cluster- two bright and one
       much fainter. SPACETRACK predictions do not match
       configuration so not sure if identification correct.
       Third member far too faint to get shadow entry time.
    
    2. Telstar 10 - rather faint - suspect may have  
       estimated shadow entry a little early
    
    3. SPACETRACK predicts GSAT3 in cluster Insat3C and
       Kalpana 1 - not seen.
    
    4. ESA 96065 , also known as  90036 05629A has no SPACETRACK
       no. Inclination 1.5 degrees.
       
    5. Cosmos 1366 (82044A) - this is a positional measurement-
       not suitable for shadow entry timing as irregular flashing
       mag +10 to invisible ( ie fainter than mag 12.5)
    
    6. Intelsat 906 did a slow flare to about mag +2 for several
       seconds about a 2 minutes before shadow entry - brilliant.
       
    7. ESA 96106 , also known as 90035 05625A has no SPACETRACK
       no. Current elements somewhat "off".
    
    8. Rather faint.
    
    9. ESA 96074 also known as 90013 03564A
       
    10. This satellite is flashing roughly every 20 seconds so is
    not suitable for shadow entry timing. This is a position of 
    one of the flashes shortly before probably shadow entry.
    
    Using the 200mm lens certainly increases the number of satellites
    suitable for shadow entry timing.
    
    
    Cheers
    Greg
    
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