Re: Sat ID request

From: Bram Dorreman (
Date: Sun Jan 06 2002 - 19:11:23 EST

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    I have my doubts about 1987-027B as the best candidate.
    This Zenit rocket did not vary in brightness as fast as indicated.
    Unfortunately there are no observations reported at or around that date
    so I cannot be for 100 percent sure. My closest observation was of
    August 8, 2000 and show a steady object as many observations before and
    If it was flashing as fast as twice or three times a second I should
    expect a remainder of this as a slowed down flashing four months later and
    was not found.
    -----Original Message-----
    From: Stephen Fels <>
    To: SeeSat <>
    Date: zaterdag 5 januari 2002 20:12
    Subject: Re: Sat ID request
    >> Could anyone help me id this please?
    >It would appear Cosmos 1833 Rocket COSPAR 17590 1987-027B a Russian Zenit 2
    >upper stage is your best candidate.
    >> April 26, 2000
    >> 03:10 UT
    >> My location:
    >> 42 4' 19" N
    >> 80 8' 34" W
    >> 733' ASL
    >> While waiting for an ISS pass (one of my first) I saw a rapidly flashing
    >> (2-3 per second) bright (-3ish) object travel almost the same path as the
    >> ISS about one minute prior to the ISS.
    >> These were the heavens-above details from that ISS pass for me (GMT-5):
    >> Start 22:10:55 10deg NW
    >> Peak 22:13:14 22deg NNE
    >> End 22:13:17 22deg NNE
    >I've repeated the ISS output from Satellite Hunting, in order to add the
    >numeric Azimuth values...
    >Local Time     Elev.    Azimuth    Mag
    >10:10:50 PM    10  326 [NW]  2.3
    >10:13:13 PM    22   021 [N]    1.3
    >10:13:19 PM    22    024 [N]   1.3
    >Cosmos 1833r
    >Local Time      Elev.    Azimuth    Mag
    >10:09:32 PM    10    342 [N]    5.4
    >10:15:10 PM    62    064 [E]    3.3
    >10:16:57 PM    41    124 [SE]   3.8
    >> Obvious to me now is this was ISS debris or shuttle debris, but could
    >> someone help me id this.  And if so please tell me how to do it.
    >I went to FTP directory /pub/space/elements/molczan/cs-2000/ at
    > and searched for the nearest TLE after your
    >Then, I loaded cs000427.Z (an April 27, 2000 TLE set) into Satellite
    >Hunting, entered your coordinates and time and ran a set of predictions.
    >Cosmos 1833r was in the right part of the sky at the right time, so I
    >clicked on the COSPAR number, which told me it was a Zenit 2 and a bright
    >variable flasher. Then I compared its path with ISS in the Plot Path/Stars
    >screen. Facing North, the Cosmos would have appeared to move somewhat
    >in the sky (they were on diverging paths), toward Ursa Minor. However, as
    >you started watching ISS, the Cosmos rocket would have appeared almost
    >parallel, moving ahead of ISS, through Cassiopeia. At the point ISS went
    >into shadow, they would have been separated by about 20 degrees, as the ISS
    >would have been moving on more of a left-to-right path.
    >Home Page:
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