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🛰️ SATELLITE · HISTORICAL RECORD

TW-1B

Re-entered 31 Mar 2021

TW-1B (NORAD 40927, COSPAR 2015-051C) was a CN satellite that re-entered Earth's atmosphere on 31 Mar 2021, launched on 25 Sep 2015 on the TW-1? mission. It was operated by NJUST as part of the NJUST programme. The spacecraft was built by NJUST on the Cubesat 2U bus, with a mass of 1.7 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
1.7
kg mass

Lifecycle

Launched25 Sep 2015 · on the TW-1? mission
Operational1 Nov 2015 · entered service
Retired1 Jan 2021 · end of operational service
Re-entered31 Mar 2021 · atmospheric re-entry — object destroyed

Specifications

NORAD ID40927
COSPAR2015-051C
TypeSatellite
OperatorNJUST
Country / StateCN
ManufacturerNJUST
BusCubesat 2U
Mass1.7 kg
ProgrammeNJUST
CategoryTECH
OrbitLEO (LLEO/S)
Altitude466 × 485 km
Inclination97.3°

Frequently asked questions

What happened to TW-1B?

TW-1B re-entered Earth's atmosphere on 31 Mar 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 TW-1B re-enter the atmosphere?

TW-1B re-entered on 31 Mar 2021, according to Orbital Radar's historical catalogue records.

How long was TW-1B operational?

TW-1B was operational for roughly 5 years, from 1 Nov 2015 to 1 Jan 2021.

Who operated and built TW-1B?

TW-1B was operated by NJUST and built by NJUST (CN).

Launched together

PJ-1Re-entered 2024TW-1CRe-entered 2021TW-1ARe-entered 2022
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.