MUOS 3: pre-launch estimated orbital elements

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 20 Jan 2015 12:10:34 -0500
MUOS 3 is scheduled for launch from CCAFS on an Atlas V-551 on 2015 Jan 21; the launch window is from 00:43 to 01:27
UTC. Launch coverage is available at Spaceflight Now:

http://spaceflightnow.com/2015/01/19/av052-mission-status-center/

The following *rough* TLEs are based on launch at window-open.

MECO 1                                                   167 X 624 km
1 79701U          15021.03843750  .00000000  00000-0  00000-0 0    06
2 79701  28.0000 311.7871 0337670 130.0000   3.3000 15.58830000    00

MECO 2                                                 193 X 34447 km
1 79702U          15021.04849655  .00000000  00000-0  00000-0 0    08
2 79702  26.0000 314.1875 7227302 179.9293   1.5500  2.38040000    05

MECO 3                                                3801 X 35786 km
1 79703U          15021.14784377  .00000000  00000-0  00000-0 0    09
2 79703  19.1000 319.4078 6110508 179.0000  88.4351  2.05080000    03

The MECO 3 estimate is likely the most accurate of the three, and should be reasonably close.

Spacecraft separation is planned to occur at T+2:53:22. Soon afterward, the Centaur will conduct a Collision and
Contamination  Avoidance Maneuver (CCAM), followed by a blow-down of remaining Centaur propellants. The typical Centaur
end of mission occurs 4400 s after spacecraft separation. Prospective observers should use the MECO 3 TLE to evaluate
visibility.

Eventually, the payload will enter an approximately 5 deg inclined GEO orbit in one of the existing UFO slots.

Ted Molczan


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Received on Tue Jan 20 2015 - 11:10:58 UTC

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