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🛰️ SATELLITE · HISTORICAL RECORD

Silu-1

Re-entered 11 Apr 2019

Silu-1 (NORAD 42903, COSPAR 2017-021F) was a CN satellite that re-entered Earth's atmosphere on 11 Apr 2019, launched on 20 Apr 2017 on the Tianzhou 1 mission. It was operated by XCYS as part of the XCYS programme. The spacecraft was built by HHJ on the Cubesat 3U bus, with a mass of 4 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.

2017
launched
2019
re-entered
2
years on orbit
4
kg mass

Lifecycle

Launched20 Apr 2017 · on the Tianzhou 1 mission
Operational1 Apr 2019 · entered service
Retired1 Apr 2019 · end of operational service
Re-entered11 Apr 2019 · atmospheric re-entry — object destroyed

Specifications

NORAD ID42903
COSPAR2017-021F
TypeSatellite
OperatorXCYS
Country / StateCN
ManufacturerHHJ
BusCubesat 3U
Mass4 kg
ProgrammeXCYS
CategoryTECH
OrbitLEO (LLEO/I)
Altitude386 × 395 km
Inclination42.8°

Frequently asked questions

What happened to Silu-1?

Silu-1 re-entered Earth's atmosphere on 11 Apr 2019, ending a mission that began with its launch in 2017. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Silu-1 re-enter the atmosphere?

Silu-1 re-entered on 11 Apr 2019, according to Orbital Radar's historical catalogue records.

Who operated and built Silu-1?

Silu-1 was operated by XCYS and built by HHJ (CN).

Launched together

Tianzhou-1Re-entered 2017
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.