Re: Shenzhou 6 launched

From: satcom (john@satcom.freeserve.co.uk)
Date: Wed Oct 12 2005 - 02:58:48 EDT

  • Next message: Thierry Marais: "Shenzhou 6 catalogued"

    CCTV 4 , which is available on satellite TV throughout Europe , seems to 
    have continual coverage of the mission.
    
    No chance  of visuals here ( UK ) , we are under a very thick blanket of 
    could  :O((
    
    
    John.
    
    
    
    
    ----- Original Message ----- 
    From: "Ted Molczan" <seesat@rogers.com>
    To: <SeeSat-L@satobs.org>
    Sent: Wednesday, October 12, 2005 4:07 AM
    Subject: Shenzhou 6 launched
    
    
    >I watched CCTV's live web cast of the launch, on 2005 Oct 12 at or about 
    >01:00
    > UTC.
    >
    > According to my clock, the launch was one or two minutes later, but I 
    > suspect
    > that was the result of various delays in the web cast, so I assume launch 
    > was at
    > 01:00 UTC.
    >
    > Roughly speaking, the northern hemisphere will have morning visibility; 
    > the
    > southern hemisphere will have evening visibility. Use the search elements 
    > to
    > determine your observing prospects.
    >
    > USSTRATCOM has yet to issue orbital elements, so for now, my estimated 
    > elsets
    > will have to suffice.
    >
    > I suggest the following elements for the 2nd stage rocket:
    >
    > Shenzhou 6 r    15.5  3.4  0.0  4.4 d
    > 1 70601U 70600B   05285.08931662  .00809611  00000-0  60000-3 0    09
    > 2 70601  42.4153  27.4814 0102545 130.0626 230.9292 16.03716253    07
    >
    > The spacecraft's orbits are expected to be as follows:
    >
    > 1. Elliptical Parking Orbit until 2005 Oct 12 at 07:53 UTC
    >
    > The spacecraft and rocket body will be in nearly same orbit for the first 
    > approx
    > 6 h and 53 m after launch. Below are search elsets for both.
    >
    > Shenzhou 6       7.8  2.5  0.0  5.4 d
    > 1 70600U 70600A   05285.08933035  .00794136  00000-0  60000-3 0    09
    > 2 70600  42.4153  27.4814 0106040 130.0626 230.9292 16.02866600    01
    >
    > The rocket's apogee will be nearly 5 km lower than Shenzhou's, as a result 
    > of
    > its separation manoeuvre upon orbital insertion. Therefore, Shenzhou will 
    > trail
    > a short distance behind its rocket.
    >
    > 2. Circularized Orbit after 2005 Oct 12 at 07:53 UTC
    >
    > Shenzhous 1, 3, 4 and 5 manoeuvred to raise their perigee as they passed 
    > through
    > apogee for the 5th time. Shenzhou 1 raised its perigee by only 8 km; 
    > Shenzhous
    > 3, 4 and 5 raised it more than 130 km, to nearly circularize their orbit, 
    > and
    > Shenzhou 6 is expected to do the same. Approx 6 h and 53 m after launch,
    > Shenzhou 6 should be in this orbit:
    >
    > Shenzhou 6       7.8  2.5  0.0  5.4 d
    > 1 70600U 70600A   05285.33849619  .00000000  00000-0  00000-0 0    02
    > 2 70600  42.4207  25.8822 0002833 248.3475 111.7085 15.78579562    08
    >
    > Note that the zero decay terms of the circularized Shenzhou elements are
    > intentional; past missions made a number of small manoeuvres throughout 
    > their
    > flight, that essentially negated the effects of drag, apparently to 
    > achieve a
    > nearly exactly repeating ground track every 31 revolutions.
    >
    > Ted Molczan
    >
    >
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    > 
    
    
    
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