[Fwd: Observed all three KeyHoles on Mar.23 ?]

Bjoern Gimle (bjorn@tt-tech.se)
Thu, 26 Mar 1998 17:14:55 +0100

This is a multi-part message in MIME format.
--------------D2123CE385CE2800948C6EA8
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Thanks to David Brierley for generating an orbit for my possible
obs. of USA 116 !

David also built (the first?) verified orbit for USA 116 in June 1997,
though I had a few possible observations in April. I couldn't combine
them into a single orbit - possibly there was both an UNID among those,
and a reboost of USA 116 in between.

Please help me verify this one before it maneuvres ! I have clouds since
yesterday, and snow/rain predicted for tomorrow.

I noticed that (at least in the hypermail) one line was missing
in my first message on the subject. In my 'Sent' basket, the first
line below had a 'gt' sign in col.1 :

likely offset from the USA 129 pass time. At about 21:49 UT, I saw....

-- 

---------------------------------------------------------------
-- bjorn@tt-tech.se (office)  b_gimle@algonet.se (home)      --
--                            b_gimle@usa.net (temp)         --
-- 59.2237N, 18.2286E, 44 m   http://www.algonet.se/~b_gimle --
-- SeeSat-L / Visual Satellite Observer Home Page found at   --
-- http://www.satellite.eu.org/satintro.html       --
---------------------------------------------------------------
--------------D2123CE385CE2800948C6EA8
Content-Type: message/rfc822
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Message-ID: <35178B31.4A6F7402@tt-tech.se>
Date: Tue, 24 Mar 1998 11:30:09 +0100
From: Bjoern Gimle <bjorn@tt-tech.se>
Reply-To: bjorn@tt-tech.se
Organization: TT-Technology AB
X-Mailer: Mozilla 4.02 [en] (Win95; I)
MIME-Version: 1.0
To: SeeSat-L <seesat-l@lists.satellite.eu.org>
CC: Bengt Ottosson <bengt.ottosson@mbox304.swipnet.se>
Subject: Observed all three KeyHoles on Mar.23 ?
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Thanks to the Russell Eberst observations 980317:
9208301 211952.86 200253+480330 6.5 6.5 0 S
9208301 212006.83 201814+463755 6.7 6.7 0 S
I could easily find USA 86 near the predicted time and position,
after adjusting B* and ndot2 to match his obs.
My preliminary obs are:
9208301 205132.0  025030+5108   4   4     S  
9208301 205143.2  022200+5010   4   4     S
9208301 205145.3  021730+5000   4   4     S

Earlier, at 19:07 UT, I verified the pass of USA 129.
This is now near MM=14.83, and should be due for a major reboost any
day or week. It ought to be observed daily !

>From 21:15 to 21:52 I searched for USA 116. This would be the most
likely offset from the USA 129 pass time. At about 21:49 UT, I saw
an object matching the speed and brightness of USA 116, on a track
parallell to the prediction. No other object in molczan.tle, above
mag.+7 and within +/- 3 min, matched this track.

To match the track with a simple extrapolation from the Sep.1997
elset, I had to increase RAAN by about a degree. I set MM to match
the current value for USA 129, though it is more likely .002 above
or below it - and due for a reboost when USA 129 is raised.

9506601 214827.6  191800+5200   1   1     
9506601 214854.8  201200+5350   4   4
9506601 214922.5  210840+5332   4   4
9506601 214934.5  212830+5254   4   4

The first two points do not have a good reference star ID.

Two chance observations: One at 20:08, mag.+4 steady, moving in 45
seconds from near del UMa to eta Dra - possible ID is Cosmos 1842;
one moving 6.5 degrees straight down (or 190 degrees) through Lyra
at 21:20:40-21:21:25, mag.+6

Remarkable about the Keyholes are that all three flared or glinted !
I went out very late for USA 129, and saw immediately three flashes
around mag.-1, separated by 8 seconds, near culmination. 18 seconds
later there was a small brightening, about one magnitude.

USA 86 had a single flare near phi Per at mag.+0.

When I detected USA 116 (?) in binoculars, it was fading from about +1.

USA 129         15.0  3.0  0.0  5.1 v            979 x 265
1 24680U 96072  A 98070.83701467  .00022000  00000-0  21865-3 0    06
2 24680  97.8430 132.1314 0510000 154.5534 205.4465 14.82197530    07
USA 116         15.0  3.0  0.0  5.1 v            986 x 255
1 23728U 95 66  A 98082.89686557  .00022000  00000-0  21865-3 0    34
2 23728  97.8755 195.3942 0522345 331.0949  26.2224 14.82729204 35115
USA 86          15.0  3.0  0.0  5.1 v            1010 x 409
1 22251U 92 83  A 97265.84784039  .00001180  00000-0  78400-4 0    02
2 22251  97.7722 349.4000 0423996 241.2649 118.7349 14.54976309    00

-- 

---------------------------------------------------------------
-- bjorn@tt-tech.se (office)  b_gimle@algonet.se (home)      --
--                            b_gimle@usa.net (temp)         --
-- 59.2237N, 18.2286E, 44 m   http://www.algonet.se/~b_gimle --
-- SeeSat-L / Visual Satellite Observer Home Page found at   --
-- http://www.satellite.eu.org/satintro.html       --
---------------------------------------------------------------

--------------D2123CE385CE2800948C6EA8--