Mons Gruithuisen Gamma (γ) is a lunar dome that lies to the north of the crater Gruithuisen at the western edge of the Mare Imbrium.
The dome has a diameter of 20 km and climbs gently to a height of over 1500 meters.Mons Gruithuisen Gamma, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)LROC Quickmap, DEM contours layer At the summit is a small crater.
To the east lies the similar Mons Gruithuisen Delta (δ). Together they are often informally called the Gruithuisen domes. To the south of the Gruithuisen domes is a portion of Oceanus Procellarum that was named Sinus Viscositatis by the International Astronomical Union (IAU) in December 2022.Sinus Viscositatis, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
Mons Gruithuisen Gamma was expected to be the landing site for Peregrine Mission One, which launched on January 8, 2024, on the maiden flight of the Vulcan Centaur rocket. The mission failed due to a leaky valve, precluding any attempt at landing.
Firefly Aerospace plans to use a Blue Ghost lander to deploy a rover at Gruithuisen Gamma in 2028 as part of NASA's Commercial Lunar Payload Services program. Lunar-VISE instruments on the lander and rover will map local variations in geological compositions and thermophysical propertieshttps://fireflyspace.com/missions/blue-ghost-mission-3/
A small (150 m diameter) crater located near the summit of Mons Gruithuisen Gamma was named Mareta by the IAU in June 2025.Mareta, Gazetteer of Planetary Nomenclature
See also
List of mountains on the Moon Mareta West Volcanism on the Moon
References
External links Gruithuisen Domes - Constellation Region of Interest, Lunar Reconnaissance Orbiter article New Views of the Gruithuisen Domes, Lunar Reconnaissance Orbiter article