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GB/T 45621-2025Space terminology — Space debris (English PDF)

航天术语空间碎片

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 30, 2025

Implementation date

September 1, 2025

Scope

GB/T 45621-2025 is the English-translated version of 航天术语空间碎片.

GB/T 45621-2025 is the Chinese national standard covering the vocabulary the other space debris standards are written in — the general terms that separate a man-made object from a meteoroid, an asteroid or a near-Earth object, then the terms of monitoring, of collision warning, of shielding and protection, of mitigation and active removal, and of the environment models, each with its definition and English equivalent, and the index at the back. The other 2025 space debris standards take their definitions from here. First edition, in force from 1 September 2025. Issued on 30 May 2025, it has been in force since 1 September 2025.

Document preview — GB/T 45621-2025

National Standard of the People's Republic of China

ICS: 49.140
Classification: V 70

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 General terms1
4 General terminology5
5 Monitoring9
6 Warning12
7 Protection15
8 Mitigation and removal1921
9 Environmental Model21
Reference23
Index24

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Technical Committee for Standardization of Aerospace Technology and Its Applications (SAC/TC425).

This document was drafted by: National Astronomical Observatory of the Chinese Academy of Sciences, Harbin Institute of Technology, China Academy of Launch Vehicle Technology, Beijing Space Flight Center Spacecraft General Design Department, China Aerospace Standardization Institute.

The main drafters of this document are: Liu Jing, Jiang Hai, Yang Xu, Cheng Haowen, Pang Baojun, Shen Lin, Yan Jun, Quan Haofang, Li Xiaolong, Han Leran, Zhang Jia, Cao Li, Zhang Yao, Li David, Zhao Nanying. Space debris

1 Scope

This document defines terms related to space debris and their definitions.

This document is applicable to scientific research, engineering practice and academic exchanges related to the field of space debris.

2 Normative references

This document has no normative references.

3 General terms

3.1 space object spaceobject

Natural objects (celestial bodies) and man-made objects that orbit in the universe.

3.2 Meteoroid

Small celestial bodies in the solar system with sizes ranging from 30µm to 1m.

3.3 Micrometeoroid

Small, dust-sized meteoroids.

Note. Usually refers to meteoroids with a size less than 1 mm.

[Source. GB/T 32452-2015, 3.8.2.2, modified]

3.4 Small solar system body

Solar system bodies other than planets, dwarf planets and their satellites.

3.5 asteroid

Small rocky solar system bodies ranging in size from 1m to about 1000km.

3.6 Near Earth Object (NEO)

Small Solar System bodies with orbital perihelion distances less than 1.3 AU.

Note. Includes two major categories. near-Earth asteroids and near-Earth comets.

3.7 Near Earth Asteroid;NEA

Asteroids with an orbital perihelion less than 1.3 AU.

3.8 comet comet

Small solar system bodies composed of ice, dust, and larger rocks that typically move in elliptical orbits.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 33 pages — is available in the English PDF.

Referenced standards

Cited by

Editions of GB/T 45621

Edition	Title	Revision	Status
GB/T 45621-2025	Space terminology - Space debris	current edition	Current

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