NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Peregrine Mission 1



The Peregrine Lunar Lander, carrying scientific and other payloads to the Moon, is scheduled to touch down on the lunar surface in mid- to late 2021. This first launch of the lander is designated Peregrine Mission 1. Peregrine Mission 1 was selected through NASA's Commercial Lunar Payload Services (CLPS) program, in which NASA contracts with a commercial partner, in this case Astrobotic, that provides the launch and lander.

Spacecraft and Subsystems

Peregrine Mission 1 has a dry mass of approximately 770 kg and is about 1.9 m high and roughly 2.5 m across. It is a box-shaped main body sitting on 4 landing legs. The main structural landing bus is composed of aluminum isogrid shear panels and aluminum honeycomb mounting surfaces. Propulsion is provided by five ISE-100 667-N thrusters mounted on the bottom of the lander. They use a hypergolic system of Mono-Methyl Hydrazine (MMH) fuel and dinitrogen tetroxide/nitrogen dioxide, 25% Mixed Oxides of Nitrogen (MON-25) oxidizer. Four sets of three 45-N attitude control thrusters maintain orientation. Attitude knowledge is provided by Sun and star trackers, inertial measurement, and Doppler radio and LIDAR. Power (at 28 V) is generated by GaInP/GaAs/Ge triple junction solar cells mounted on the top of the lander and stored in lithium-ion batteries. Communications are via a medium gain, low-gain, and WLAN antenna. Thermal control is achieved by radiators and multi-layer insulation blankets.

The mission will carry 14 payloads of various types, the lander has a payload mass capacity of 90 kg. The scientific payload includes the Laser Retro-Reflector Array (LRA), Navigation Doppler Lidar for Precise Velocity and Range Sensing (NDL), Surface Exosphere Alterations by Landers (SEAL),Photovoltaic Investigation on Lunar Surface (PILS), Linear Energy Transfer Spectrometer (LETS), Near-Infrared Volatile Spectrometer System (NIRVSS), Mass Spectrometer Observing Lunar Operations (MSolo), PROSPECT Ion-Trap Mass Spectrometer (PITMS), Neutron Measurements at the Lunar Surface (NMLS), and Fluxgate Magnetometer (MAG).

Mission Profile

Launch is scheduled in late 2021 from Cape Canaveral, Florida on a United Launch Alliance Vulcan Centaur rocket in the VC2S configuration, with 2 GEM-63XL solid boosters, a standard short faring, and two RL10 engines in the Centaur upper stage. The lander will touch down in the Lacus Mortis region of the Moon.

Image credit: Astrobotic

Alternate Names

    Facts in Brief

    Launch Date: 2020-09-01
    Launch Vehicle: VC2S
    Launch Site: Cape Canaveral, United States
    Mass: 770 kg

    Funding Agency

    • Unknown (United States)


    • Planetary Science

    Additional Information

    Questions and comments about this spacecraft can be directed to: Dr. David R. Williams



    NameRoleOriginal AffiliationE-mail
    Dr. Sharad BhaskaranMission
    [] NASA Logo -