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🛰️ SATELLITE · HISTORICAL RECORD

AC-10a Probe 04

Re-entered 13 Feb 2021

AC-10a Probe 04 (NORAD 46928, COSPAR 2019-022N) was a US satellite that re-entered Earth's atmosphere on 13 Feb 2021, launched on 17 Apr 2019 on the Cygnus NG-11 mission. It was operated by AERO as part of the AC10 Probe programme. The spacecraft was built by AERO on the AC-10 Probe bus, with a mass of 0.016 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.

2019
launched
2021
re-entered
2
years on orbit
0.016
kg mass

Lifecycle

Launched17 Apr 2019 · on the Cygnus NG-11 mission
Operational21 Apr 2020 · entered service
Retired21 Apr 2020 · end of operational service
Re-entered13 Feb 2021 · atmospheric re-entry — object destroyed

Specifications

NORAD ID46928
COSPAR2019-022N
TypeSatellite
OperatorAERO
Country / StateUS
ManufacturerAERO
BusAC-10 Probe
Mass0.016 kg
ProgrammeAC10 Probe
CategorySCI
OrbitLEO (LLEO/I)
Altitude468 × 481 km
Inclination51.6°

Frequently asked questions

What happened to AC-10a Probe 04?

AC-10a Probe 04 re-entered Earth's atmosphere on 13 Feb 2021, ending a mission that began with its launch in 2019. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did AC-10a Probe 04 re-enter the atmosphere?

AC-10a Probe 04 re-entered on 13 Feb 2021, according to Orbital Radar's historical catalogue records.

Who operated and built AC-10a Probe 04?

AC-10a Probe 04 was operated by AERO and built by AERO (US).

Launched together

BIRD-LKARe-entered 2021BIRD-JPNRe-entered 2021BIRD-NPLRe-entered 2021SpooQy-1Re-entered 2021IOD-1 GEMSRe-entered 2021SwiatowidRe-entered 2021KRAKsatRe-entered 2022VCC ARe-entered 2021
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.