JTC-1830
Mare Crisium
High on the ringed wall of Crisium, close enough to the limb that libration slowly rocks it in and out of view.
- Coordinates
- 19.70° N, 62.10° E
- Diameter
- 4.4 km
Schematic elevation, rendered from catalogue data. Sunlight from the west.
Mare Crisium
16.40° N, 57.80° E
Inside the Sea of Crises, a perfectly isolated oval ringed by mountains and the easiest lunar sea to pick out with the naked eye.
Look to the eastern edge of the disc. Crisium appears as a distinct dark oval two nights after new moon.
The bright, ancient uplands. Rougher country, more dramatic in a telescope.
Dedication
$189
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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-1766 lies at 16.40° N, 57.80° E, in Mare Crisium. On the map, north is up and east is to the right, exactly as it appears through a telescope from the high desert.

Mare Crisium
High on the ringed wall of Crisium, close enough to the limb that libration slowly rocks it in and out of view.
Mare Nectaris
On the floor of the Sea of Nectar, a small, deep basin whose concentric rings are still traceable four billion years on.
Mare Imbrium
A clean, bowl-shaped impact on the smooth floor of the Sea of Showers. Its rim is young enough to still throw a crisp shadow at first quarter.