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🛰️ SATELLITE · HISTORICAL RECORD

Horyu-4

Re-entered 2 Jul 2026

Horyu-4 (NORAD 41340, COSPAR 2016-012D) was a J satellite that re-entered Earth's atmosphere on 2 Jul 2026, launched on 17 Feb 2016 on the ASTRO-H mission. It was operated by Kyutech as part of the Kyutech programme. The spacecraft was built by KYUT on the HORYU bus, with a mass of 10 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.

2016
launched
2026
re-entered
10
years on orbit
10
kg mass

Lifecycle

Launched17 Feb 2016 · on the ASTRO-H mission
Operational1 May 2026 · entered service
Retired1 May 2026 · end of operational service
Re-entered2 Jul 2026 · atmospheric re-entry — object destroyed

Specifications

NORAD ID41340
COSPAR2016-012D
TypeSatellite
OperatorKyutech
Country / StateJ
ManufacturerKYUT
BusHORYU
Mass10 kg
ProgrammeKyutech
CategoryTECH
OrbitLEO (LLEO/I)
Altitude557 × 577 km
Inclination31.0°

Frequently asked questions

What happened to Horyu-4?

Horyu-4 re-entered Earth's atmosphere on 2 Jul 2026, ending a mission that began with its launch in 2016. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Horyu-4 re-enter the atmosphere?

Horyu-4 re-entered on 2 Jul 2026, according to Orbital Radar's historical catalogue records.

Who operated and built Horyu-4?

Horyu-4 was operated by Kyutech and built by KYUT (J).

Launched together

ASTRO-HNORAD 41337ChubuSat-2NORAD 41338ChubuSat-3NORAD 41339
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-16.