Jansen (crater)
{{short description|Impact crater}}
{{Distinguish|Janssen (lunar crater)}}
{{Infobox Lunar crater
| image = Jansen crater AS17-M-2879.jpg
| image_size =
| caption = Apollo 17 Mapping Camera image
| coordinates = {{coord|13.5|N|28.7|E|globe:moon_type:landmark|display=inline,title}}
| diameter = 24 km
| depth = 0.6 km
| area =
| colong = 351
| eponym = Zacharias Janssen
}}
File:Posidonius-Agrippa Si - Aldo Ferruggia.jpg
File:Jansen crater AS15-81-10952.jpg]]
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.{{gpn|2798}} 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
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.
| class="wikitable"
!width="25%" style="background:#eeeeee;" |Jansen !width="25%" style="background:#eeeeee;" |Latitude !width="25%" style="background:#eeeeee;" |Longitude !width="25%" style="background:#eeeeee;" |Diameter |
| align="center"|D
|align="center"|15.7° N |align="center"|28.4° E |align="center"|7 km |
| align="center"|E
|align="center"|14.5° N |align="center"|27.8° E |align="center"|7 km |
| align="center"|G
|align="center"|9.3° N |align="center"|26.0° E |align="center"|6 km |
| align="center"|H
|align="center"|11.4° N |align="center"|28.4° E |align="center"|7 km |
| align="center"|K
|align="center"|11.5° N |align="center"|29.7° E |align="center"|6 km |
| align="center"|L
|align="center"|14.7° N |align="center"|30.1° E |align="center"|7 km |
| align="center"|R
|align="center"|15.2° N |align="center"|28.8° E |align="center"|25 km |
| align="center"|T
|align="center"|11.4° N |align="center"|33.5° E |align="center"|5 km |
| align="center"|U
|align="center"|11.9° N |align="center"|32.3° E |align="center"|4 km |
| align="center"|W
|align="center"|10.2° N |align="center"|29.5° E |align="center"|3 km |
| align="center"|Y
|align="center"|13.4° N |align="center"|28.6° E |align="center"|4 km |
The following craters have been renamed by the IAU.
File:Jansen L crater AS15-P-9862.jpg|Jansen L
File:Jansen R crater AS17-P-2318.jpg|Oblique view of the ghost crater Jansen R ("pancake" at center) and Jansen D crater (lower right)
References
{{Reflist}}
{{refbegin}}
- {{cite book
| last1 = Andersson
| first1 = L. E.
| last2 = Whitaker
| first2 = E. A.
| author-link2 = Ewen Whitaker
| date = 1982
| title = NASA Catalogue of Lunar Nomenclature
| publisher = NASA RP-1097
}}
- {{cite book
| last1 = Bussey
| first1 = B.
| author-link1 = Ben Bussey
| last2 = Spudis
| first2 = P.
| author-link2 = Paul Spudis
| date = 2004
| title = The Clementine Atlas of the Moon
| publisher = Cambridge University Press
| location = New York
| isbn = 978-0-521-81528-4
}}
- {{cite book
| last1 = Cocks
| first1 = Elijah E.
| last2 = Cocks
| first2 = Josiah C.
| date = 1995
| title = Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature
| publisher = Tudor Publishers
| isbn = 978-0-936389-27-1
| url = https://archive.org/details/isbn_9780936389271
}}
- {{cite web
| last = McDowell
| first = Jonathan
| date = July 15, 2007
| url = http://host.planet4589.org/astro/lunar/
| title = Lunar Nomenclature
| publisher = Jonathan's Space Report
| access-date = 2007-10-24
}}
- {{cite journal| last1 = Menzel| first1 = D. H.| last2 = Minnaert| first2 = M.| last3 = Levin| first3 = B.| last4 = Dollfus| first4 = A.| last5 = Bell| first5 = B.| title = Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU| doi = 10.1007/BF00171763| journal = Space Science Reviews| volume = 12| issue = 2| pages = 136–186| year = 1971| bibcode = 1971SSRv...12..136M| s2cid = 122125855}}
- {{cite book
| first = Patrick
| last = Moore
| author-link = Patrick Moore
| date = 2001
| title = On the Moon
| publisher = Sterling Publishing Co
| isbn = 978-0-304-35469-6
| url = https://archive.org/details/patrickmooreonmo00patr
}}
- {{cite book
| first = Fred W.
| last = Price
| date = 1988
| title = The Moon Observer's Handbook
| publisher = Cambridge University Press
| isbn = 978-0-521-33500-3
}}
- {{cite book
| last = Rükl
| first = Antonín
| author-link = Antonín Rükl
| date = 1990
| title = Atlas of the Moon
| publisher = Kalmbach Books
| isbn = 978-0-913135-17-4
}}
- {{cite book
| last = Webb
| first = Rev. T. W.
| author-link = Thomas William Webb
| date = 1962
| title = Celestial Objects for Common Telescopes
| edition = 6th revised
| publisher = Dover
| isbn = 978-0-486-20917-3
| url = https://archive.org/details/celestialobjects00webb
}}
- {{cite book
| first = Ewen A.
| last = Whitaker
| author-link = Ewen Whitaker
| date = 1999
| title = Mapping and Naming the Moon
| publisher = Cambridge University Press
| isbn = 978-0-521-62248-6
}}
- {{cite book
| first = Peter T.
| last = Wlasuk
| date = 2000
| title = Observing the Moon
| publisher = Springer
| isbn = 978-1-85233-193-1
}}
{{refend}}
External links
{{Commonscat}}
- [http://www.lpi.usra.edu/resources/mapcatalog/LTO/lto60b2_1/ LTO-60B2 Jansen] — L&PI topographic map
- {{cite web
|last=Wood
|first=Chuck
|date=January 15, 2007
|url=http://www.lpod.org/?m=20070115
|title=Stereo Jansen
|publisher=Lunar Photo of the Day
|access-date=2007-01-15
|url-status=dead
|archive-url=https://web.archive.org/web/20070927004315/http://www.lpod.org/?m=20070115
|archive-date=September 27, 2007
}}