&sq=Facebook&lang=en&file=File:Nielsen_crater_4158_h1.jpg) Lunar Orbiter 4 image | |
| Coordinates | 31°48′N 51°46′W / 31.80°N 51.76°W |
|---|---|
| Diameter | 9.64 km (5.99 mi) |
| Depth | Unknown |
| Colongitude | 52° at sunrise |
| Eponym | Axel V. Nielsen Harald H. Nielsen |
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Nielsen is a lunar impact crater on the Oceanus Procellarum. It is located north-east of Montes Agricola on the western hemisphere of the Moon. To the east-southeast is the crater Wollaston.
Nielsen is a bowl-shaped formation that lies astride a small ridge that runs north-northwestwards towards the Mons Rümker. The latter is an unusual raised formation of lunar domes.
In 1973, the crater was named jointly after the Danish astronomer Axel Nielsen (1902-1970) and the Danish–American physicist Harald Herborg Nielsen (1903-1973), by the IAU.[1]