Circumlunar Booster Tug (LBT)
Yuzhnoye Design Bureau
The Circumlunar Booster Tug (LBT) is an in-space propulsion stage developed by Yuzhnoye SDO for capturing payloads arriving on translunar trajectories into stable lunar orbit. Powered by the RD861K engine burning nitrogen tetroxide and UDMH propellants, it delivers 21.3 tonnes of useful mass into lunar orbit from its own liftoff mass of 30.5 tonnes. The […]
Typed specifications2 values
Discloses 1 of 10 fields engineers filter by in this category (category median 3).
- Propellant
- NTO (N2O4 or MON) product page UDMH
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier4 lines, in the manufacturer's own wording
- Liftoff mass
- 30.5 t
- Engine
- RD861K
- Propellants
- NT + UDMH
- Payload mass delivered to lunar orbit
- 21.3 t
About
The Circumlunar Booster Tug (LBT) is an in-space propulsion stage developed by Yuzhnoye SDO for capturing payloads arriving on translunar trajectories into stable lunar orbit. Powered by the RD861K engine burning nitrogen tetroxide and UDMH propellants, it delivers 21.3 tonnes of useful mass into lunar orbit from its own liftoff mass of 30.5 tonnes. The RD861K’s five-restart capability allows for lunar orbit insertion burn, circularization, and potential orbital plane corrections or on-orbit loiter. The LBT forms the second major propulsive stage in Yuzhnoye’s lunar exploration transportation stack, following the Lunar Booster Stage’s trans-lunar injection burn, and preceding the lunar lander descent stage. Together they form a fully Ukrainian-developed lunar transportation system.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.