BSAT-2b
{{Short description|Japanese communications satellite}}
{{Use American English|date=April 2021}}
{{Use mdy dates|date=April 2021}}
{{Infobox spaceflight
| name = BSAT-2b
| names_list =
| image =
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| mission_type = Communication
| operator = B-SAT
| Harvard_designation =
| SATCAT = 26864
| website =
| mission_duration = Launch failure
| spacecraft = BSAT-2b
| spacecraft_type =
| spacecraft_bus = STAR-1
| manufacturer = Orbital Sciences Corporation
| launch_mass = {{convert|1317|kg|abbr=on}}
| BOL_mass =
| landing_mass =
| dry_mass = {{convert|535|kg|abbr=on}}
| payload_mass =
| dimensions = {{convert|3.76|x|2.49|x|2.03|m|abbr=on}}
| power = 2.6 kW
| launch_date = {{start date| 2001|07|12|23|58|7=Z}} (failure)
| launch_rocket = Ariane 5G V-142
| launch_site = Guiana Space Center ELA-3
| launch_contractor = Arianespace
| deployment_from =
| deployment_date =
| entered_service =
| disposal_type = Decayed from wrong orbit
| deactivated =
| destroyed =
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| decay_date = {{end date|2014|01|28}}
| landing_date =
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| apsis =
| trans_band = 4 (plus 4 spares) Ku band
| trans_frequency =
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| trans_capacity =
| trans_coverage =
| trans_TWTA = 130 Watts
| trans_EIRP =
| trans_HPBW =
| programme = B-SAT
| previous_mission = BSAT-2a
| next_mission = BSAT-2c
| insignia =
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}}
BSAT-2b, was a geostationary communications satellite ordered by B-SAT which was designed and manufactured by Orbital Sciences Corporation on the STAR-1 platform. It was designed to be stationed on the 110° East orbital slot along its companion BSAT-2a where it would provide redundant high definition direct television broadcasting across Japan.
But the Ariane 5G rocket had an anomaly during its July 12, 2001 launch. It left BSAT-2b stranded in an orbit too low for its propulsion system to compensate and the spacecraft was written off. BSAT ordered BSAT-2c immediately to replace it. It decayed and burned in the atmosphere on January 28, 2014.
Satellite description
BSAT-2b was designed and manufactured by Orbital Sciences Corporation on the STAR-1 satellite bus for B-SAT. It had a launch mass of {{convert|1317|kg|abbr=on}}, a dry mass of {{convert|927|kg|abbr=on}}, and a 10-year design life. As all four STAR-1 satellites, it had a solid rocket Star 30CBP apogee kick motor for orbit raising, plus {{convert|200|kg|abbr=on}} of propellant for its liquid propellant station keeping thrusters.
It measured {{convert|3.76|x|2.49|x|2.03|m|abbr=on}} when stowed for launch. Its dual wing solar panels can generate 2.6 kW of power at the beginning of its design life, and span {{convert|16.10|m|abbr=on}} when fully deployed.
It has a single Ku band payload with four active transponders plus four spares with a TWTA output power of 130 Watts.
History
In March 1999, B-SAT ordered from Orbital Sciences Corporation two satellites based on the STAR-1 platform: BSAT-2a and BSAT-2b. This was the second order of the bus and the first since Orbital had acquired CTA Space Systems, the original developer.
BSAT-2b was launched aboard an Ariane 5G at 23:58 UTC, July 12, 2001, from Guiana Space Center ELA-3. It rode on the lower berth below Artemis. But the EPS upper stage had an anomaly and left the satellites on a 17,528 km × 592 km × 2.9° orbit, short of the planned 35,853 km × 858 km × 2.0°. While Artemis used its electric propulsion to make up for the difference. But BSAT-2b Star 30CBP apogee kick motor could not make up for the orbital energy short fall and was written off.
On January 28, 2014, BSAT-2b decayed from its orbit and burned in the atmosphere.
References
{{Reflist|2|refs=
{{cite web |url=http://www.arianespace.com/site/news/kit/V142launchkit.pdf |archive-url=https://web.archive.org/web/20040411160840/http://www.arianespace.com/site/news/kit/V142launchkit.pdf |archive-date=2004-04-11 |title=Launch Kit V-142 |publisher=Arianespace |date=July 5, 2001 |access-date=2016-09-06}}
{{cite web |url=http://www.b-sat.co.jp/company-profile/history/ |title=沿革 |trans-title=History |publisher=Broadcasting Satellite System Corporation |access-date=2016-09-07}}
{{cite web |url=https://www.orbitalatk.com/space-systems/commercial-satellites/communications-satellites/docs/FS008_01_OA_3695%20BSAT-2.pdf |title=BSAT-2 Series |publisher=Orbital ATK |date=2015 |archive-url=https://web.archive.org/web/20160906164538/https://www.orbitalatk.com/space-systems/commercial-satellites/communications-satellites/docs/FS008_01_OA_3695%20BSAT-2.pdf |archive-date=2016-09-06 |access-date=2016-09-06}}
}}
{{Portal|Spaceflight}}
{{BSAT satellites}}
{{Orbital launches in 2001}}
Category:Communications satellites in geostationary orbit
Category:Satellites using the GEOStar bus
Category:Spacecraft launched in 2001
Category:Satellite launch failures