UO-22

UO-22 just 100000 on 3rd Aug 2010

Subject: [amsat-bb] UO-22 just 100000 on 3rd Aug 2010
From: Mineo Wakita
Date: Sun, 30 May 2010 08:16:28 +0900

I noticed that UO-22 might be passed over just 100000 of the orbit
number before long.  UO-22 was launched on 17 July 1991.
It's now Non-Operational.

UO-22
1 21575U 91050B   10148.66466669 -.00000020  00000-0  77105-5 0  8445
2 21575  98.4922  98.6195 0008358  67.4032 292.8038 14.39719412990416
                                                               ^^^^
The above kep is 'NORAD TLE Sets Current Data'.
The orbit number is 99041, so 959 to 100000.

  100000 - 99041 = 959 ... orbit numbers until 100000
  959/14.39719412 = 66.61020140 ... orbits/mean motion = days
  148.66466669 + 66.61020140 = 215.27486809 ... epock time

The epock time 215.27486809 is 06:35:48 UTC, 3rd Aug 2010.
It maybe contains +/- one and a half hour's obserbational lag.
In addition, the counter number returns to 0 when the orbit number
exceeds 100000.

http://www.amsat.org/amsat-new/satellites/satInfo.php?satID=13


Subject: [amsat-bb] UO-22 just 100000 on 3rd Aug 2010
From: Mineo Wakita
Date: Mon, 2 Aug 2010 22:18:50 +0900

I predict here that UO-22 might be passed over just 100000 of
the orbit number using the latest TLE.

OSCAR 22 (UoSAT 5)
1 21575U 91050B   10212.53322685  .00000036  00000-0  25462-4 0  8963
2 21575 098.4959 161.9541 0006690 228.5705 131.4898 14.39726937999601
                                                               ^^^^
  100000 - 99960 = 40 ... orbit numbers until 100000
  40/14.39726937 = 2.778304619 ... orbits/mean motion = days
  212.53322685 + 2.778304619 = 215.311531469 ... epock time

  215 - 212 = 3                  ... 3rd Aug 2010
  0.311531469 * 24 = 7.476755256 ... 7 hours
  0.476755256 * 60 = 28.60531536 ... 28 minutes
  0.605315360 * 60 = 36.31892160 ... 36 seconds

Therefore it is 07:28:36 UTC, 3rd Aug 2010.

It maybe contains +/- one and a half hour's obserbational lag.
In addition, the counter number returns to 0 when the orbit number
exceeds 100000.


According to my prediction, UO-22 passed over just 100000 of
the orbit number on 3rd Aug 2010. The counter returned to 0.

OSCAR 22 (UoSAT 5)
1 21575U 91050B   10215.66062712 -.00000024 +00000-0 +62674-5 0 09003
2 21575 098.4956 165.0559 0006791 218.1829 141.8876 14.39727060000057