Jansen is a lunar impact crater in the north part of the Mare Tranquillitatis. The diameter is 24 km. It was named after 17th century Dutch optician Zacharias Janssen.[1] It is located to the east-southeast of the crater Plinius. The rim of Jansen is low and narrow, with a notch along the western edge. The interior is relatively level, which may indicate it has been covered by lava. To the south-southwest a small but prominent crater lies on the crater floor, halfway between the center and the rim.
 Apollo 17 Mapping Camera image | |
| Coordinates | 13°30′N 28°42′E / 13.5°N 28.7°E |
|---|---|
| Diameter | 24 km |
| Depth | 0.6 km |
| Colongitude | 351° at sunrise |
| Eponym | Zacharias Janssen |
To the northwest of the rim is a rille named Rima Jansen, and to the east are wrinkle ridges in the mare surface. A low ridge runs from near the southeast rim in a southeasterly direction.
Satellite craters edit
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Jansen.
| Jansen | Latitude | Longitude | Diameter |
|---|---|---|---|
| D | 15.7° N | 28.4° E | 7 km |
| E | 14.5° N | 27.8° E | 7 km |
| G | 9.3° N | 26.0° E | 6 km |
| H | 11.4° N | 28.4° E | 7 km |
| K | 11.5° N | 29.7° E | 6 km |
| L | 14.7° N | 30.1° E | 7 km |
| R | 15.2° N | 28.8° E | 25 km |
| T | 11.4° N | 33.5° E | 5 km |
| U | 11.9° N | 32.3° E | 4 km |
| W | 10.2° N | 29.5° E | 3 km |
| Y | 13.4° N | 28.6° E | 4 km |
The following craters have been renamed by the IAU.
-
Jansen L -
Oblique view of the ghost crater Jansen R ("pancake" at center) and Jansen D crater (lower right)
References edit
- ^ "Jansen (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
- Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1.
- McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.
- Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763. S2CID 122125855.
- Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
- Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
- Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
- Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.
- Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
- Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
External links edit
- LTO-60B2 Jansen — L&PI topographic map
- Wood, Chuck (January 15, 2007). "Stereo Jansen". Lunar Photo of the Day. Archived from the original on September 27, 2007. Retrieved 2007-01-15.