Re: ISS flare

Bruno Tilgner (Bruno_Tilgner@compuserve.com)
Sun, 2 May 1999 19:30:47 -0400

Michel  Jacquesson wrote:

>Yesterday April 30, despite of the moon which made the sky very 
>white, I tried to see some satellites. Nothing good indeed, except a 
>beautiful flare of ISS at 21:26:11 during 4-5 seconds with a 
>curious emerald green color seen with naked eye.

Such a flare is a rare enough event, but what makes it even more unusual
is that it has been observed by two other observers. One of them is
located in Brittany (Bretagne, France) at 593 km from Sevigny-Waleppe,
the other is near Namur/Belgium, 96 km away from Sevigny.

Unfortunately the other observers haven't recorded the time accurately
enough. Otherwise it would be possible to determine the speed of the
light beam across the ground. At any rate, it must have been a peculiar
geometry.

Bruno Tilgner
Saint-Cloud, France