🛰️ SATELLITE · HISTORICAL RECORD
SILENT BARKER 1
Historical recordSILENT BARKER 1 (NORAD 57836, COSPAR 2023-140A) is a historical US catalogue entry no longer tracked in the live catalogue, 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
3
years on orbit
1,200
kg mass
Lifecycle
Launched10 Sep 2023 · on the SILENT BARKER mission
Specifications
NORAD ID57836
COSPAR2023-140A
TypeSatellite
OperatorNRO / SFSSC
Country / StateUS
ManufacturerUNKUS
BusSILENTBARKER
Mass1,200 kg (1,000 kg dry)
ProgrammeSILENT BARKER
CategoryEW*
OrbitGEO (GEO/I)
Altitude35,784 × 35,789 km
Inclination12.3°
Frequently asked questions
What happened to SILENT BARKER 1?
SILENT BARKER 1 is a historical catalogue entry from a 2023 launch. It is not currently tracked in the live catalogue — typically meaning it has decayed, been retired, or its tracking elements have lapsed.
Who operated and built SILENT BARKER 1?
SILENT BARKER 1 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.