Re: Envisat & Mystery Satellite

From: Jean-Paul Cornec (Jean-Paul.Cornec@wanadoo.fr)
Date: Tue Apr 16 2002 - 03:13:16 EDT

  • Next message: Björn Gimle \(TietoEnator\): "Re: Envisat & Activnyi"

    Mike, Kevin
    Observing Envisat at 21:52 UTC,  I also noticed a satellite slightly
    preceding it by about 4s. It appeared first by a bright flare (0m) then,
    through 8x50 binoculars, as an irregularly tumbling object that became
    invisible after 30 s. From the TLE given by Kevin, it could have been Oscar
    19.
    CZ-4 Deb (I didn't see it) was about 1 minute behind on a lower path.
    Intercosmos 24 was earlier for me on a quite different path.
    
    Jean-Paul Cornec
    48°44' N
     3°28' W
    
    ----- Original Message -----
    From: Kevin Fetter <kevin_fetter@hotmail.com>
    To: <SeeSat-L@blackadder.lmsal.com>
    Sent: Tuesday, April 16, 2002 7:39 AM
    Subject: Re: Envisat & Mystery Satellite
    
    
    > Tom Wagner Wrote
    >
    >
    > At 21:53:11 I watched Envisat emerge from the earth's shadow. It came into
    > view in Bootes. According to Heavens-Above it was a mag 3.7. Much to my
    > delight, about 4 seconds after Envisat faded into view, another
    > satellite,maybe two magnitudes fainter, faded into view, also in Bootes
    but
    > a couple degrees higher (as I recall) than Envisat. The second satellite
    was
    > traveling on a parallel course with Envisat but was moving more slowly.
    >
    > Can anybody determine what that second satellite might have been?
    >
    >
    > Well I get the following in the area and moving at parallel tracks.
    >
    > OSCAR 19 (LUSAT)
    > 1 20442U 90005G   02105.13337598  .00000610  00000-0  24516-3 0  7382
    > 2 20442  98.3822 172.7211 0013027  45.9032 314.3214 14.31500835638367
    > CZ-4 DEB
    > 1 26441U 99057KN  02105.13892161  .00010372  00000-0  31141-2 0  3995
    > 2 26441  98.4212 172.6177 0103414 153.6946 207.1815 14.39803406103290
    >
    > Here is some data from the oig
    >
    > IntID/Name   CatNo Source period   Incl Apogee Perigee      RCS
    > ------------ ----- ------ ------ ------ ------ ------- --------
    >
    > 1990-005G    20442 ARGN    100.6   98.4    796     777   0.2579
    > OSCAR 19 (LUSAT)          Launched (1990/01/22)
    >
    > 1999-057KN   26441 PRC     100.0   98.4    825     695   0.6601
    > CZ-4 DEB                  Launched (1999/10/14)
    >
    > Lusat or Oscar 19 is a amateur radio satellite.
    >
    > CZ-4 deb was part of the CZ-4 rocket used to lauch the CBERS 1 and SACI 1
    > satellites. When the rocket came apart in orbit, it put different parts in
    > different orbits.
    >
    > Both objects were predicted to be slightly ahead of envisat at the time of
    > his observation.  CZ-4 deb was 4 seconds ahead or early compared to
    envisat
    > using the above elements. Lusat was around 1 seconds early based on the
    > elements above.
    >
    >
    > Kevin
    >
    >
    >
    >
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