Star One B4

From Wikipedia, the free encyclopedia
  (Redirected from Brazilsat B4)
Jump to navigation Jump to search
Star One B4
Mission type Communication
Operator Embratel
Star One
COSPAR ID 2000-046A
SATCAT no. 26469
Mission duration 12 years
Spacecraft properties
Bus HS-376W
Manufacturer Hughes
Launch mass 2,495 kilograms (5,501 lb)
Dry mass 1,757 kilograms (3,874 lb)
Start of mission
Launch date 17 August 2000 (2000-08-17), 23:16:00 UTC
Rocket Ariane 44LP-3
Launch site Kourou ELA-2
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude 75° West / 92° West / 70° West / 84° West
Semi-major axis 42,165.0 kilometres (26,200.1 mi)
Perigee 35,782.3 kilometres (22,234.1 mi)
Apogee 35,806.1 kilometres (22,248.9 mi)
Inclination
Period 1,436.1 minutes
Transponders
Band 28 IEEE C-band (NATO G/H-band)

Star One B4, originally deignated Brasilsat B4 is a Brazilian communications satellite which is operated by Star One. It was constructed by the Hughes Space and Communications Company, and is based on the HS-376W satellite bus. It was the penultimate HS-376, and final HS-376W to be launched. Its launch was contracted by Arianespace, using an Ariane 4 44LP-3 carrier rocket. The launch occurred at 23:16 GMT on 17 August 2000, from the ELA-2 launch pad at the Guiana Space Centre. The Nilesat 102 satellite was launched on the same rocket.

It was originally built and launched as Brasilsat B4 for Embratel, and was later transferred to Embratel's subsidiary Star One and renamed. Following its launch it raised itself into geostationary orbit by means of its onboard R-4D apogee motor, and was positioned at 75° West for on-orbit testing. This was completed in September 2000, and it was moved to 92° West, arriving in October. It remained at that position until January 2007 when it was relocated to 70° West. It arrived on station in February, and subsequently departed in June 2008. In July 2008 it arrived at 84° West, where it is currently stationed. It carries twenty eight transponders, and has an expected on-orbit lifespan of 12 years. It initially replaced the Brasilsat A2 satellite.

References[edit]

  • Krebs, Gunter. "Brasilsat B 1, 2, 3, 4 / Star One B 1, 2, 3, 4". Gunter's Space Page. Retrieved 2009-05-05.
  • "Brasilsat B4". Lyngsat. Retrieved 2009-05-05.
  • McDowell, Jonathan (2000-08-25). "Issue 433". Jonathan's Space Report. Retrieved 2009-05-05.