Superbird-4 → Superbird-B2
NamesSuperbird-4 (1995 to Jul 1997) Superbird-B2 (Jul 1997 onward)
Mission typeCommunication
SKY Perfect JSAT Group
COSPAR ID2000-012A
SATCAT no.26095Edit this on Wikidata
Mission duration13 years
Spacecraft properties
Launch mass4,057 kilograms (8,944 lb)
Start of mission
Launch date18 February 2000 (2000-02-18)
RocketAriane 44LP-3
Launch siteKourou ELA-2
Orbital parameters
Reference systemGeocentric
Longitude162° East

Superbird-B2, also known by its pre-launch designation Superbird-4, is a Japanese communications satellite which is operated by SKY Perfect JSAT Group. It was originally built and launched for the Space Communications Corporation, which merged with JSAT in October 2008. It was constructed by Hughes and is based on the HS-601HP satellite bus. Launch occurred on 18 February 2000, at 01:04 GMT. The launch was contracted by Arianespace, and used an Ariane 4 44LP-3 carrier rocket flying from ELA-2 at the Guiana Space Centre.

Satellite description

It is primarily used to transmit what its operators describe as "area information", and provide a backup VSAT system to Japanese local government.

Following its launch and on-orbit testing, it was placed in geostationary orbit at 162° East, from where it provides communications services to Japan. It is equipped with thirty five transponders.

Currently, the J-Alert emergency warning system is broadcast via Superbird-B2.


  • Krebs, Gunter. "Superbird 4 (Superbird B2)". Gunter's Space Page. Retrieved 2009-05-02.
  • "Superbird B2". Lyngsat. Retrieved 2009-05-02.[dead link]
  • McDowell, Jonathan (2000-02-29). "Issue 421". Jonathan's Space Report. Archived from the original on 2011-06-08. Retrieved 2009-05-02.
  • "Superbird-B2". JSAT Corporation. 2008-12-31. Archived from the original on 2009-11-28. Retrieved 2009-05-02.
  • Ray, Justin (2000-02-18). "Ariane 4 rocket launches Japan's Superbird 4". Spaceflight Now. Retrieved 2009-05-02.
  • Ray, Justin (2000-02-18). "Mission Status Center". Ariane Flight V127. Spaceflight Now. Retrieved 2009-05-02.