Jansen (crater)

Impact crater

Not to be confused with Janssen (lunar crater).

Feature on the moon

Jansen

Apollo 17 Mapping Camera image

Coordinates| 13°30′N 28°42′E﻿ / ﻿13.5°N 28.7°E﻿ / 13.5; 28.7
Diameter| 24 km
Depth| 0.6 km
Colongitude| 351° at sunrise
Eponym| Zacharias Janssen
The crater area (at the right) in selenochromatic format (Si). More infos here : https://www.gawh.it/main/selenocromatica Oblique view from Apollo 15

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.

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

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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 B — See Carrel.
* Jansen C — See Beketov.
* Jansen F — See Cajal.

* Jansen L

* Oblique view of the ghost crater Jansen R ("pancake" at center) and Jansen D crater (lower right)

## References

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1. ^ "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. `{{cite book}}`: ISBN / Date incompatibility (help)
* 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

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Wikimedia Commons has media related to Jansen (crater).

* 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.