JTC-1519
Mare Serenitatis
On the pale inner floor of the Sea of Serenity, a lava plain so flat that altimeters struggle to find a metre of relief for miles.
- Coordinates
- 27.90° N, 18.40° E
- Diameter
- 4.7 km
Schematic elevation, rendered from catalogue data. Sunlight from the west.
Mare Serenitatis
24.10° N, 12.60° E
Where the Sea of Serenity meets the highlands, on ground that has been struck, flooded by lava, and struck again.
Sits close to the monthly terminator line twice a month, which is when its shadow is longest.
Large craters that catch the sunrise line and throw kilometres of shadow.
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The Moon keeps one face turned toward Earth, so your crater is fixed in the same spot of sky every clear night of your life.
JTC-1583 lies at 24.10° N, 12.60° E, in Mare Serenitatis. On the map, north is up and east is to the right, exactly as it appears through a telescope from the high desert.

Mare Serenitatis
On the pale inner floor of the Sea of Serenity, a lava plain so flat that altimeters struggle to find a metre of relief for miles.
Oceanus Procellarum
Adrift in the Ocean of Storms, the largest dark expanse on the Moon and the last ground the lunar sunset reaches each month.
Mare Imbrium
Set against a wrinkle ridge, a frozen buckle in lava that cooled three billion years ago. The ridge points toward the crater like a drawn arrow.