Tiselius (crater)
Encyclopedia
Tiselius is a 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...

 impact 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...

 that lies just to the east of Valier
Valier (crater)
Valier is a lunar impact crater that lies on the far side of the Moon. It is nearly attached to the western rim of the crater Tiselius. To the north-northwest lies the larger Sharonov, to the south-southwest is Coriolis, and west of Valier is Dufay....

, on the Moon
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...

's far side. The craters Tiselius and Valier are separated by only a few kilometers. Less than one crater diameter to the east of Tiselius is the smaller, elongated Stein, and to the north is the small, eroded Šafařík
Šafarík (crater)
Šafařík is a small lunar impact crater on the far side of the Moon. It lies due north of the crater Tiselius and to the east-southeast of Sharonov. This is a worn and eroded crater with smaller impacts along the rim to the east and northwest...

.

This is a roughly circular crater with a well-defined edge that has not been significantly degraded by impact erosion. The inner walls have slumped in places to form piles of scree
Scree
Scree, also called talus, is a term given to an accumulation of broken rock fragments at the base of crags, mountain cliffs, or valley shoulders. Landforms associated with these materials are sometimes called scree slopes or talus piles...

. The interior floor is marked by a few small craterlets, and there is an irregular group of ridges around the mid-point. The small, cup-shaped satellite crater Tiselius E lies near the eastern outer edge.

The crater was named after Nobel laureate Arne Tiselius
Arne Tiselius
Arne Wilhelm Kaurin Tiselius was a Swedish biochemist who won the Nobel Prize in Chemistry in 1948.- Biography:Tiselius was born in Stockholm...

.

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 Tiselius.
Tiselius Latitude Longitude Diameter
E 7.3° N 177.7° E 17 km
L 4.6° N 177.4° E 12 km
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