ISO 20991:2025

Space systems — Requirements for small spacecraft

Publication date: Oct 7, 2025

General information

Current stage: 60.60 Effective date: Oct 7, 2025

Originator: ISO

Owner: ISO/TC 20/SC 14

Type: International Standard

ICS: 49.020

Languages: English

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Status: Published

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Scope

This document describes minimum requirements for small spacecraft.
This document covers different categories of small spacecraft – so-called mini-, micro-, nano-, pico- and femto-, as well as CubeSat, spacecraft. Therefore, for the sake of convenience, the term “small spacecraft” is used throughout this document as a generic term.
This document can be applied by small spacecraft developers, as well as dispenser providers and launch operators.

ISO 20991:2025

Space systems — Requirements for small spacecraft

General information

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Scope

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