🛰️ SATELLITE · HISTORICAL RECORD
SILENT BARKER 2
Retired 2023SILENT BARKER 2 (NORAD 57837, COSPAR 2023-140B) is a retired US satellite, withdrawn from service around 10 Sep 2023, launched on 10 Sep 2023 on the SILENT BARKER mission. It was operated by NRO / SFSSC as part of the SILENT BARKER programme. The spacecraft was built by UNKUS on the SILENTBARKER bus, with a mass of 1,200 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
2023
launched
2023
retired
3
years on orbit
1,200
kg mass
Lifecycle
Launched10 Sep 2023 · on the SILENT BARKER mission
Operational10 Sep 2023 · entered service
Retired10 Sep 2023 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID57837
COSPAR2023-140B
TypeSatellite
OperatorNRO / SFSSC
Country / StateUS
ManufacturerUNKUS
BusSILENTBARKER
Mass1,200 kg (1,000 kg dry)
ProgrammeSILENT BARKER
CategoryEW*
OrbitGEO (GEO/ID)
Altitude36,214 × 36,234 km
Inclination12.0°
Frequently asked questions
What happened to SILENT BARKER 2?
SILENT BARKER 2 was retired from service around 10 Sep 2023 after launching in 2023. It is no longer operational but remains catalogued.
Who operated and built SILENT BARKER 2?
SILENT BARKER 2 was operated by NRO / SFSSC and built by UNKUS (US).
Launched together
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.