Montes Harbinger is an isolated cluster of lunar

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

 mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

s at the western edge of the Mare Imbrium

Mare Imbrium

Mare Imbrium, Latin for "Sea of Showers" or "Sea of Rains", is a vast lunar mare filling a basin on Earth's Moon and one of the larger craters in the Solar System. Mare Imbrium was created when lava flooded the giant crater formed when a very large object hit the Moon long ago...

 basin. They are located to the northeast of the flooded crater Prinz

Prinz (crater)

Prinz is the lava-flooded remains of a lunar crater on the Oceanus Procellarum. The formation lies to the southwest of the prominent crater Aristarchus. To the north-northeast is the flooded crater Krieger....

. The mountains consist of four primary ridges plus several smaller hills, each forming a small rise surrounded by the lunar mare

Lunar mare

The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...

. The mountains are centered at selenographic coordinates 27.0° N, 41.0° W, within a diameter of 90 km. The formation is so-named because the peaks serve as the harbinger

Harbinger

-Places:* Montes Harbinger, lunar mountains* Harbinger, an unincorporated community in Currituck County, North Carolina-Transportation:* Harbinger , ship also called Norfolk in 1797* Harbinger , thoroughbred racehorse...

s of dawn on the crater Aristarchus

Aristarchus (crater)

Aristarchus is a prominent lunar impact crater that lies in the northwest part of the Moon's near side. It is considered the brightest of the large formations on the lunar surface, with an albedo nearly double that of most lunar features. The feature is bright enough to be visible to the naked eye,...

, located to the southwest.