Re: Irid 25 head-on with another sat

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Mon Sep 17 2001 - 08:16:54 EDT


With new satbase.tle, I have EO-1, #26619, 0.4 degrees below at 18:00:20
UTC.

Landsat 4, #13367, and Landsat 7, #25682, are in orbits nearly parallell to
EO-1, passing 19 and 56 seconds before EO-1, thus meeting Ir 25 earlier, and
at greater distance.

#21825 DMSP 5D-2 F11 deb D was about 1 degree above Ir 25 at 18:00:33 UTC.

Cosmos 1163, #11698, was 1.3 degrees below Ir 25 at 18:00:27, while the
flare was beginning, but predicted near mag +9.6 by Skymap, but COULD have
been bright?

(Skymap screen shots sent to Denis)


-- bjorn.gimle@tietotech.se (office)                         --
-- b_gimle@algonet.se (home)  http://www.algonet.se/~b_gimle --
-- COSPAR 5919, MALMA,    59.2576 N, 18.6172 E, 23 m         --
-- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m         --

>
>     26619, EO-1, is a good bet, although it is 0.7 mag dimmer than landsat
4, 5.5 and 4.8 respectively, it
> does pass Ir 25 within one degree at 22:00:20 Moscow time, closer to the
time
> of the predicted flare.  21825 and 11698 are much further from any
appearance of a head on collision and they
> are 9th and 10th mag objects, barring any flares or maxima.


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