Flamsteed is a small 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...

 crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 located on the Oceanus Procellarum

Oceanus Procellarum

Oceanus Procellarum is a vast lunar mare on the western edge of the near side of the Earth's Moon. Its name derives from the old superstition that its appearance during the second quarter heralded bad weather...

. It lies almost due east of the dark-hued Grimaldi

Grimaldi (crater)

Grimaldi is a large basin located near the western limb of the Moon. It lies to the southwest of the Oceanus Procellarum, and southeast of the crater Riccioli...

, and north-northwest of the flooded Letronne

Letronne (crater)

Letronne is the lava-flooded remnant of a lunar crater. The northern part of the rim is completely missing, and opens into the Oceanus Procellarum, forming a bay along the southwestern shore...

 bay on the south edge of the 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 rim of this crater is not circular in form, having a bulging rim to the southeast. The interior is relatively flat and undistinguished by impacts. The crater lies within the southern rim of a crater that has been almost completely submerged by the basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

ic lava

Lava

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...

 flows that formed the Oceanus Procellarum. All that remains of this feature designated Flamsteed P are some low ridges and hills arranged in a circular formation.

The Surveyor 1

Surveyor 1

Surveyor 1 was the first lunar soft-lander in the unmanned Surveyor program of the National Aeronautics and Space Administration . This lunar soft-lander gathered data about the lunar surface that would be needed for the manned Apollo Moon landings that began in 1969...

craft landed within the northeast rim of the buried Flamsteed P feature, about 50 kilometers north-northeast of the Flamsteed crater rim.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Flamsteed.

Flamsteed	Latitude	Longitude	Diameter
A	7.9° S	42.9° W	11 km
B	5.9° S	43.7° W	10 km
C	5.5° S	46.3° W	9 km
D	3.2° S	44.9° W	6 km
E	3.7° S	46.1° W	2 km
F	4.7° S	41.1° W	5 km
G	4.8° S	50.9° W	46 km
H	5.9° S	51.7° W	4 km
J	6.6° S	49.3° W	5 km
K	3.1° S	43.7° W	4 km
L	3.4° S	40.9° W	4 km
M	2.4° S	40.6° W	4 km
P	3.2° S	44.1° W	112 km
S	3.4° S	52.2° W	4 km
T	3.1° S	51.6° W	24 km
U	3.6° S	50.2° W	4 km
X	2.3° S	47.3° W	3 km
Z	1.3° S	47.8° W	3 km