Re: Newest Orbcomms Seen

Brian Hunter (bkh@chem.QueensU.CA)
Fri, 25 Sep 1998 11:43:34 -0400

I have also seen the 8 new orbcomms.
They passed 2 degrees s of gamma lyra at the following times 1998 09 24 UT.


1  5  58  25479 ORBCOMM FM 25
1  6  01  25476 ORBCOMM FM 22
1  6  04  25480 ORBCOMM FM 26
1  6  08  25481 ORBCOMM FM 27
1  6  30  25482 ORBCOMM FM 28
1  6  33  25478 ORBCOMM FM 24
1  6  35  25477 ORBCOMM FM 23
1  6  38  25475 ORBCOMM FM 21


The identifications are based on elsets downloaded from OIG about seven
hours before the observations.  They are, as one would expect from the
launch profile, in two groups of four.

I was observing with an 80 mm telecope and I would estimate them as much
brighter than Ron's estimates.  Most were in the 6.0 - 6.5 magnitude range
with the last being noticably fainter at about 7.5 magnitude.   This is
consistent with observations of earlier ones; which, under good condiditons,
are easy to see in  my 10 x 40 binoculars.

-----Original Message-----
From: Ron Lee <ronlee@pcisys.net>
To: SeeSat-L@blackadder.lmsal.com <SeeSat-L@blackadder.lmsal.com>
Date: Friday, September 25, 1998 4:39 AM
Subject: Newest Orbcomms Seen


>Just saw the newest Orbcomms (#24575-24582) in the 02:23 to 02:25 UT
>(25 Sep 98) timeframe.  Used an 8" telescope. estimated magnitude 8-9.
>It appeared that the brightness on some varied but the visibility
>duration for each was at best two seconds so this may have been due to
>others reasons than a real variation in brightness.
>
>Ron Lee
>
>