Fwd: Standard magnitudes for KH 11/12

bjorn@tt-tech.se
Fri, 8 Dec 1995 10:29:45 +0100

Strange things happen when I use MS Mail's address book (Win-95)
Sometimes I get immediate response like '... no available
transfer service...', but not in this case.
This mail has not reached me from seesat-l (yet), and you may
not have received it ?
When I cut+paste from the address book, it seems to work.

 ----------
Fr=E5n:  Bj=F6rn Gimle
Skickat:   den 7 december 1995 09:36
Till:  'seesat-l@iris01.plasma.mpe-garching.mpg.de,Internet'
Kopia:  'molczan@neocom.ca'; 'rans7500@spacelink.msfc.nasa.gov'
Ang=E5ende: Re: Standard magnitudes for KH 11/12

... From Russell's observations ....   ALL  692   4.05 +/- 0.05   0.0283 =20=
=20
+/- 0.0015
     92-83A doesn't look like a KH-11 satellite:
     USA 86 (KH-12?) 1992-083A    89   5.05 +/- 0.10   0.0205 +/- 0.0030

Though I rarely make accurate magnitude estimates, my impressions support =20=
=20

this suspicion. As I reported in the summer of -93 and -94, it was always =20=
=20
much
fainter than the KH 11s. In July -95 I started to see flashes ( up to -2  =20
!), and in
August up to six flashes per pass, of varying magnitude, but I never  =20
worked out
a pattern, since the period between flashes was 4 - 40 seconds  =20
approximately.

Unless this satellite has large flat surfaces in several directions, I  =20
would say
that it was tumbling, or spinning with mis-aligned solar panels. This  =20
could be
a reason for early replacement.

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