🛰️ SATELLITE · HISTORICAL RECORD
USSF-51 PL4
Historical recordUSSF-51 PL4 (NORAD 65724, COSPAR 2024-134H) is a historical US catalogue entry no longer tracked in the live catalogue, launched on 30 Jul 2024 on the USSF-51 mission. It was operated by SFSSC as part of the USSF GEO Unk programme. The spacecraft was built by UNKUS on the Unknown bus, with a mass of 100 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
2024
launched
2
years on orbit
100
kg mass
Lifecycle
Launched30 Jul 2024 · on the USSF-51 mission
Specifications
NORAD ID65724
COSPAR2024-134H
TypeSatellite
OperatorSFSSC
Country / StateUS
ManufacturerUNKUS
BusUnknown
Mass100 kg
ProgrammeUSSF GEO Unk
CategoryEW*
OrbitGEO (GEO/D)
Altitude35,990 × 36,635 km
Inclination0.2°
Frequently asked questions
What happened to USSF-51 PL4?
USSF-51 PL4 is a historical catalogue entry from a 2024 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 USSF-51 PL4?
USSF-51 PL4 was operated by SFSSC and built by UNKUS (US).
Launched together
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.