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AsteriaStar
Propellant

UDMH / N2O4

Also known as Hypergolic (UDMH)

Rockets

Overview

A storable hypergolic combination that ignites on contact without an igniter. Long the mainstay of the Proton and early Long March vehicles; toxic and being phased out for new designs.

Knowledge connections

Sources

The primary and reference sources this topic draws on.

  • NASANational Aeronautics and Space Administration

    Mission data, planetary science, space telescopes, and public-domain imagery.

    Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.