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🛰️ SATELLITE · HISTORICAL RECORD

AC-8a

Re-entered 11 Oct 2021

AC-8a (NORAD 40659, COSPAR 2015-025J) was a US satellite that re-entered Earth's atmosphere on 11 Oct 2021, launched on 20 May 2015 on the X-37B No. 2? mission. It was operated by AERO as part of the Aerocube programme. The spacecraft was built by AERO 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
2021
re-entered
6
years on orbit
2
kg mass

Lifecycle

Launched20 May 2015 · on the X-37B No. 2? mission
Operational1 Jan 2020 · entered service
Retired1 Jan 2020 · end of operational service
Re-entered11 Oct 2021 · atmospheric re-entry — object destroyed

Specifications

NORAD ID40659
COSPAR2015-025J
TypeSatellite
OperatorAERO
Country / StateUS
ManufacturerAERO
BusCubesat 1.5U
Mass2 kg
ProgrammeAerocube
CategoryTECH
OrbitLEO (LLEO/I)
Altitude356 × 700 km
Inclination55.0°

Frequently asked questions

What happened to AC-8a?

AC-8a re-entered Earth's atmosphere on 11 Oct 2021, 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 AC-8a re-enter the atmosphere?

AC-8a re-entered on 11 Oct 2021, according to Orbital Radar's historical catalogue records.

Who operated and built AC-8a?

AC-8a was operated by AERO and built by AERO (US).

Launched together

X-37B No. 2 F2Re-entered 2017Unix Space Server LangleyRe-entered 2023Optical CubeSat 1Re-entered 2022ParkinsonSat-1Re-entered 2021BRICSat-PRe-entered 2024Optical CubeSat 2Re-entered 2023GEARRS-2Re-entered 2022Optical CubeSat 3Re-entered 2023
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.