Janssen
Contents
Janssen, with Rimae Janssen on its floor
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Lat: 45.4°S, Long: 40.3°E, Diam: 199 km, Depth: 2.74 km, [/R%C3%BCkl%2067 Rükl: 67], [/stratigraphy pre-Nectarian] |
Table of Contents
George Tasroudis Janssen is the large depressed area filling most of the image, with [/Fabricius Fabricius] on its upper right floor (and [/Metius Metius] partially visible beyond that). The two shadowed craters at lower right are [/Steinheil Steinheil] and [/Watt Watt]. The curved [/rima rille] arcing like a tail out of [/Fabricius Fabricius] is part of [/Rimae%20Janssen Rimae Janssen].
Images
LPOD Photo Gallery Lunar Orbiter Images
Maps
([/LAC%20zone LAC zone] 114D3) LAC map Geologic map
Description
Description: Elger
([/IAU%20Directions IAU Directions]) JANSSEN.--An immense irregular enclosure, reminding one of the very similar area, bordered by [/Walther Walther], [/Lexell Lexell], [/Hell Hell], &c., in the third quadrant. It extends about 150 miles from W. to E., and more than 100 from N. to S., its limits on the N. being rather indefinite. Its very rugged humpy surface includes one great central mountain, and innumerable minor hills and ridges, craters, and crater-pits; but the principal feature is the magnificent curved [/Rimae%20Janssen rill-valley] running from the S. side of [/Fabricius Fabricius] across the rough expanse to the S. side. This fine object, very coarse on the N., passes the central mountain on the W. side, and becomes gradually narrower as it approaches the border; before reaching which, another finer cleft branches from it on the E., and also runs to the S. side of the plain.
Description: Wikipedia
Additional Information
- Depth data from [/Kurt%20Fisher%20crater%20depths Kurt Fisher database]
- Westfall, 2000: 2.74 km
- Satellite crater Janssen K is [/radar%20bright radar bright] at 70 cm.
- Satellite craters Janssen H and K are on the [/ALPO%20list%20of%20bright%20ray%20craters ALPO list of bright ray craters].
- Included on the [/ALPO%20list%20of%20banded%20craters ALPO list of banded craters]
Nomenclature
- Named for Pierre Jules César Janssen (February 22, 1824 – December 23, 1907), a French astronomer who in 1868 discovered how to observe solar prominences without an eclipse.
- This feature was Catalog number 4483 in Mary Blagg's [/Collated%20List Collated List]. The name was noted in [/Neison%2C%201876 Neison, 1876], where it is attributed to [/Birt Birt]. [/Beer%20and%20M%C3%A4dler Beer and Mädler] did not name the feature, and [/Julius%20Schmidt Julius Schmidt] called it (or at least a portion of it) [/Argelander Argelander], a designation he says he had used since 1854, including on [/Lohrmann Lohrmann]'s charts.
- Neison's use of the name Janssen for the present feature was adopted by the IAU in [/Named%20Lunar%20Formations Named Lunar Formations].
- Not to be confused with [/Jansen Jansen].
LPOD Articles
Black and Wispy.
Janssen
Highland Rilles
Crateric Concatenation
Some New Features
Greek Theater Mask
A Rim?
Kaguya Moon (Janssen Peak).
Bibliography
Harold Hill. [/A%20Portfolio%20of%20Lunar%20Drawings A Portfolio of Lunar Drawings], pages 230, 231.
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u2
