Gregory is a lunar impact crater on the far side of the Moon. It is located to the southeast of the crater Ibn Firnas, and north-northeast of Bečvář. About one crater diameter to the north is the smaller Morozov.
Coordinates | 2°12′N 127°12′E / 2.2°N 127.2°E |
---|---|
Diameter | 64 km |
Colongitude | 234° at sunrise |
Eponym | James Gregory |
This is a worn and eroded crater formation. The northern rim is degraded due to impacts. Attached to the exterior of the southwest is Gregory Q, a satellite crater about the same size as Gregory. Within the interior is the remains of a small crater rim along the northwestern inner wall. To the east of Gregory and leading away to the southeast is a crater chain designated Catena Gregory.[1]
The crater was named after 17th century Scottish astronomer and mathematician James Gregory by the IAU in 1970.[2] While Gregory itself was unnumbered, its satellite crater Gregory Q was known as Crater 282 prior to naming in 2006.[3][4]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Gregory.
Gregory | Latitude | Longitude | Diameter |
---|---|---|---|
K | 0.4° S | 128.5° E | 26 km |
Q | 0.6° N | 125.7° E | 68 km |