1965-27A, C, and D

Mike McCants (mikem@freeside.fc.net)
Wed, 24 Mar 1999 11:06:13 -0600 (CST)

David Brierley wrote:

>In reply to Philip Chien's posting, here are the facts as I remember
>them after 34 years..
>
>1965-27C and D were objects of similar appearance, mostly faint, but
>flashing irregularly to naked eye visibility.  The word was that they
>were two halves of a fairing made of plastic, with a very low radar RCS.

This matches my memory.  :-)

I turned in a request to OIG for "historical elsets" and got back
elsets for A, B, C, and D for 1965,  Here are a few of them.

1 01314U 65027  A 65094.09160434  .00000000 +00000-0 +00000-0 0 00014
2 01314 090.0259 213.2711 0021264 246.9418 112.8338 12.91309255000038

1 01315U 65027  B 65104.46796380  .00000000 +00000-0 +00000-0 0 00046
2 01315 090.2083 213.6472 0030470 193.1204 166.9022 12.92109922001377

The B object was not very close to the others.

1 01316U 65027  C 65097.19081007  .00003065 +72220-8 +00000-0 0 00035
2 01316 090.2118 213.4894 0020162 226.4266 133.4806 12.91395740000437

The C object is very close to A.

1 01389U 65027  D 65145.84716898  .00002619 +52733-8 +00000-0 0 00013
2 01389 090.1934 214.3765 0036399 108.8138 251.5979 12.91485853006714

The C and D objects seem to vary in mean motion during 1965.  Possibly
this indicates a rather large area to mass ratio.

Here are predictions for the "latitudinally-challenged" site of Houston,
Texas (I changed the drag terms to zero.):

  29.500  95.500  300.   Houston, Tx

***  1965 May  18  Tue evening  *** Times are PM CDT  ***  2055  541

 1389 Snaps D                    1.1      
 H  M  S  Tim Al Azi C Dir  Mag Dys F  Hgt Shd  Rng  EW Phs  R A   Dec
23 35 50   .0 62  42   230  7.3  -7 7  809  30  896 1.1  67 1552  47.6
23 36 58   .0 49  22   212  7.9  -7 8  808 196 1011  .9  84 1620  64.2

 1314 Snapshot      11.6 1.5     9.4 3.4   4.0
 H  M  S  Tim Al Azi C Dir  Mag Dys F  Hgt Shd  Rng  EW Phs  R A   Dec
23 36  3   .0 62  42   230  5.3  -5 8  805  25  892 1.1  67 1552  47.5
23 37 10   .0 49  22   212  5.8  -5 8  804 191 1006  .9  84 1620  64.2

 1316 Snaps C                    1.2       6.0
 H  M  S  Tim Al Azi C Dir  Mag Dys F  Hgt Shd  Rng  EW Phs  R A   Dec
23 36  6   .0 62  42   230  7.3  -1 8  803  22  890 1.1  67 1553  47.5
23 37 14   .0 49  22   212  7.8  -1 8  802 188 1004  .9  84 1620  64.2

This indicates that they had separated by only about 16 seconds some
40 days after launch.  I probably saw them about this time.  I'm
having trouble finding my original observing records.  :-)

Mike McCants