| Coordinates: | 7°N 176.5°W |
| Diameter: | 53 km |
| Depth: | Unknown |
| Colong: | 176 |
| Eponym: | Arne W. K. Tiselius |
Tiselius is a lunar impact crater that lies just to the east of Valier, on the Moon'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.
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. The interior floor is marked by a few small craterlets, and there is an irregular group of ridges around the midpoint. The small, cup-shaped satellite crater Tiselius E lies near the eastern outer edge.
The crater was named after Swedish biochemist Arne Tiselius, by the IAU in 1979.[1]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint 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 |
. Patrick Moore . 2001 . On the Moon . Sterling Publishing Co. . 978-0-304-35469-6 .
. Antonín Rükl . 1990 . Atlas of the Moon . Kalmbach Books . 978-0-913135-17-4 .
. Thomas William Webb . 1962 . Celestial Objects for Common Telescopes . 6th revised . Dover . 978-0-486-20917-3 .
. Ewen Whitaker . 1999 . Mapping and Naming the Moon . Cambridge University Press . 978-0-521-62248-6 .