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🛰️ SATELLITE · HISTORICAL RECORD

FIREBIRD U4

Re-entered 2 Aug 2023

FIREBIRD U4 (NORAD 40378, COSPAR 2015-003C) was a US satellite that re-entered Earth's atmosphere on 2 Aug 2023, launched on 31 Jan 2015 on the SMAP mission. It was operated by MSU / UNH as part of the MSU programme. The spacecraft was built by MSU/UNH on the Cubesat 1.5U bus, with a mass of 2 kg. Like most satellites in low orbits, it was gradually slowed by atmospheric drag until re-entry. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.

2015
launched
2023
re-entered
8
years on orbit
2
kg mass

Lifecycle

Launched31 Jan 2015 · on the SMAP mission
Operational1 Jul 2023 · entered service
Retired1 Jul 2023 · end of operational service
Re-entered2 Aug 2023 · atmospheric re-entry — object destroyed

Specifications

NORAD ID40378
COSPAR2015-003C
TypeSatellite
OperatorMSU / UNH
Country / StateUS
ManufacturerMSU/UNH
BusCubesat 1.5U
Mass2 kg
ProgrammeMSU
CategorySCI
OrbitLEO (LLEO/S)
Altitude436 × 671 km
Inclination99.1°

Frequently asked questions

What happened to FIREBIRD U4?

FIREBIRD U4 re-entered Earth's atmosphere on 2 Aug 2023, ending a mission that began with its launch in 2015. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did FIREBIRD U4 re-enter the atmosphere?

FIREBIRD U4 re-entered on 2 Aug 2023, according to Orbital Radar's historical catalogue records.

Who operated and built FIREBIRD U4?

FIREBIRD U4 was operated by MSU / UNH and built by MSU/UNH (US).

Launched together

SMAPNORAD 40376FIREBIRD U3Re-entered 2023GRIFEXRe-entered 2024CalPoly CP10Re-entered 2024
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.