Last observation of IGS 1A from site 4160 (BD) on 2014-07-17

From: Bram Dorreman via Seesat-l <>
Date: Fri, 18 Jul 2014 01:23:23 +0200
With favorite weatherforecast I intended to prepare my last observation
(hopefully) of IGS 1A carefully.

This decaying satellite was predicted low North-East. My most unfavorable
direction from my regular site. Therefore I determined an alternate
location from where I could look over the trees of the woods around us.
This is near a little one-room house, that is normally uninhabited. It is
sometimes used during holidays by members of youth associations enjoying a
one or two week stay in our "green village". This morning it was quiet as
normally. Therefore I used my Garmin GPS 12 to determine its geographical

When I cycled to this location for my final observation it was an unwelcome
surprise to see lights in that house. And about twenty young people were in
lively discussions, with several outside lanterns on, just between the spot
I liked to observe from and the part of the sky, near Mirach (beta
Andromedae), where IGS 1A was expected.
Nice for those people but not for me. I had to adjust my observing place.
There was not enough time to go to another dark location. Therefore I chose
the least worst spot nearby.

Fortunately I saw my target object in the selected area. It surprised me by
a magnitude -2 flash and moved at high speed to the north, becoming
invisible. Just before disappearance it was near a star of which I
estimated the distance and phase angle with respect to Mirach. It is not an
accurate observation but it might hopfully contribute to one of the last
TLE's for this classified object.

In a later e-mail I'll specify the exact geographical locations of the
alternate spots I was on when observing IGS 1A during its last days of

And here is the result:

27698 03 009A 4160 G 20140717220004300 57 15 0141367+352525 99 R+025 05

For IOD-format see:

Bram Dorreman using 7x50 binoculars

Site 4160: 51.27931 N, 5.47683 E, 35 m (WGS84)
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Received on Thu Jul 17 2014 - 18:24:16 UTC

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