RE: Observed odd ISS flare

From: Bob Christy (rdc@zarya.info)
Date: Sun Apr 15 2007 - 18:34:12 EDT

  • Next message: Marco Langbroek: "Obs ML (4353), 14 & 15 April 2007: USA 129, USA 186, Lacrosse 4, ISS, Iridium 14"

    I was watching the same pass - location about one degree further north and
    one degree to the west of Marco - there was no manifestation of a flare from
    here.
    
    The ISS was steady at mag 1 until about 25 degrees elevation and then
    increased over a period of about one minute to mag -1 before fading into
    eclipse. There was some haze so my magnitude estimates could be slightly low
    due to a lack of reference stars.
    
    Bob Christy
    Lincoln, UK
    53.2233 deg North
    0.6004 deg West 
    Height 59m 
    
    > -----Original Message-----
    > From: Marco Langbroek [mailto:marco.langbroek@wanadoo.nl] 
    > Sent: 15 April 2007 21:17
    > To: satelliet lijst (SeeSat)
    > Subject: Observed odd ISS flare
    > 
    > Hi all,
    > 
    > Just a few minutes ago I saw ISS giving off a true flare. 
    > I've never seen it 
    > doing this before.
    > 
    > It was low in the west crossing into Gemini at mag. -2, when 
    > suddenly (as if a 
    > switch was turned) it flared up by at least 1.5 to 2 extra 
    > magnitudes, for maybe 
    > a second or 2-3, and then back to its previous brightness again. Very 
    > conspicuous. I also had the impression of an orange colour 
    > but that could be due 
    > to the low elevation. Never seen this before with ISS. Time 
    > was approximately 
    > 21:07:15 UTC (Apr 15). Anyone seen this before?
    > 
    > - Marco
    > 
    > PS: at the earlier 19:34 UTC pass I was watching and 
    > photographing ISS in 
    > twilight too.
    > My new neighbours were in the courtyard, because of the unusual high 
    > temperatures. They asked me what I was doing and I explained.
    > At first they didn't want to believe me, thinking it was an 
    > airplane when I 
    > pointed them to the ISS passing. On second thought, they 
    > realized I had 
    > predicted it would pass, so probably I was right...
    > Next I could see a look in their eyes signalling probably 
    > something like: 
    > "Right. Somewhat a nutter, but not dangerous..."  ;-)
    > 
    > 
    > -----
    > Dr Marco Langbroek  -  SatTrackCam Leiden, Cospar 4353
    > Leiden, the Netherlands. 52.15412 N,  4.49081 E (WGS84), +0 m ASL
    > 
    > SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html
    > Station (b)log: http://sattrackcam.blogspot.com
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    > e-mail: sattrackcam@wanadoo.nl
    > -----
    > 
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