[FPSPACE] Did Meridian-2 fall short of target orbit?

[John Locker]

Should make for an interesting telescope target Jim !

John



----- Original Message ----- 
From: "James Oberg" <jameseoberg at comcast.net>
To: <fpspace at friends-partners.org>
Sent: Sunday, May 24, 2009 3:46 PM
Subject: [FPSPACE] Did Meridian-2 fall short of target orbit?



Jonathan's Space Report (http://planet4589.org/space/jsr/latest.html)
Meridian 2 -- Russia's second Meridian military communications satellite was 
launched by Soyuz-Fregat from Plesetsk on May 21 into a 290 x 36460 km x 
62.8 deg
orbit. This is lower than the expected 1000 x 39800 km orbit. and suggests 
that the second Fregat burn was cut short and the third one did not occur. 
According to a report on the Novosti Kosmonavtiki forum, the third stage cut 
off 5s early; the Fregat tried to make up the difference but ran dry during 
the second burn.
   TASS indicates that this launch will be given a Kosmos cover name, - it 
would be Kosmos-2451 - but Vesti and Interfaks give the Meridian name 
explicitly.




>From 'seesat'....



Looks like there was a problem with Meridian 2 launch

From: Kevin Fetter (kfetter at yahoo.com)   Date: Sat May 23 2009 - 05:25:38 
UTC

   It says [see below].    I thought the perigee was too low, when I looked 
at the orbital data.



Launch of the second Meridian [????????] communication satellite

http://russianforces.org/blog/2009/05/launch_of_the_second_meridian.shtml

    [May 22, 2009] On 22 May 2009 the Space Forces conducted a launch of a 
Soyuz-2.1a space launcher equipped with a Fregat post-boost stage, which 
delivered into orbit a Meridian military communication satellite. The launch 
took place at 01:53 MSK (21:53 21 May 2009 UTC) from the launch pad No. 4 of 
the launch complex No. 43 of the Plesetsk space launch site.

   The spacecraft received international designation 2009-029A and NORAD 
catalog number 35008. According to NORAD data, it was deployed in an orbit 
with inclination of 62.8 degrees, orbital period of about 645 minutes, 
apogee of about 36500 km, and perigee of 320 km. This is a highly-elliptical 
orbit, similar to those traditionally used by Molniya-type comm satellites.

   Although the Space Forces reported today's launch a success, the initial 
orbit of the satellite is lower than the one of the Meridian-1 satellite, 
which has the apogee of about 39000 km and perigee of about 1270 km. 
Accordingly, the orbital period is less that it is required to maintain a 
stable semisynchronous orbit. This appears to be a result of a malfunction 
of the 3rd stage, which was cut off prematurely. At this point it is not 
clear how this will affect operations of the satellite.

   Meridian-2 is a second satellite of this kind. The first, Meridian-1, was 
launched in December 2006.  UPDATE: The satellite reportedly received a 
designation Cosmos-2451. It should be noted that Meridian-1 did not receive 
a Cosmos designation.



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