Re: Mir Marathon
Bjoern Gimle (b_gimle@algonet.se)
Sun, 7 Sep 1997 10:40:56 +0200
>
>Dave Mullinex wrote:
>> I wonder how many passes could be seen in 24 hour period.
Bram Doreman wrote:
>
> According to my intuition a (northern hemisphere) observer can
> see the greatest number of consequtive Mir passes when he is at
> a location so that Mir has its most northerly point in its orbit
> at the observers northern horizon.
>...
> I leave calculations to other involved people but I am
> curious to read what they derive.
>
It has been posted by someone on SeeSat-L about half a year ago ?
Either an odd number of passes, with a northern apex pass due
North at midnight ( in summer, so it is sunlit ), or an even
number, with passes 47 minutes before and after midnight near N.
(apex may be slightly shadowed, observer a few km more south,
and local darkness may be longer) Preferably apogee at N. apex also.
Use any prediction program to verify visibility.
This is not Mir, but 7 passes of the Russian rocket Sep.23 :
59.224 -18.228 44. Tyres" 2000 19.9 0 F F F F T
*** 1997 Sept 24 Wed evening *** Times are PM MST *** 1953 524
H M S Tim Al Azi C Dir Mag Dys F Hgt Shd Rng EW Phs
97025 FaiSat-2v Rk N 3.5
19 12 24 .0 49 93 C 272 4.4 1 4 1027 897 1296 .7 44
20 58 27 .0 49 296 C 92 5.3 1 4 1027 904 1294 .7 112
22 46 4 .0 17 320 C 91 7.8 1 4 1028 923 2319 .5 134
*** 1997 Sept 25 Thu morning *** Times are AM MST *** 1953 524
H M S Tim Al Azi C Dir Mag Dys F Hgt Shd Rng EW Phs
0 35 3 .0 8 348 C 90 9.6 1 5 1029 956 2963 .5 138
2 24 49 .0 10 20 C 90 9.3 1 5 1029 993 2854 .5 140
4 13 28 .0 22 47 C 89 7.4 1 6 10281013 2047 .5 137
6 0 39 .0 69 71 C 88 4.7 2 6 10271020 1091 .8 105
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