Rima Byrgius
Contents
Rima Byrgius
(discontinued(?) IAU name; formerly Byrgius Cleft)
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Lat: 20.5°S, Long: 65.0°W, Diam: 100 km, Depth: km, [/R%C3%BCkl%2050 Rükl 50] |
Table of Contents
LO-IV-168H The discontinued name Rima Byrgius referred to the deeply shadowed arc-shaped [/rima rille] running vertically through the unnamed 130-km diameter enclosure to the right of center. The large crater partially visible on the left is [/Darwin Darwin] ([/Byrgius Byrgius] is just out of the field to the lower right). The rilles that run horizontally across [/Darwin Darwin] and the unnamed enclosure are part of [/Rimae%20Darwin Rimae Darwin]. Just out of the field in the upper right is the crater [/De%20Vico De Vico] A which the rille passes through. A wider angle view would show that Rima Byrgius is a natural and continuous extension of [/Rimae%20Sirsalis Rimae Sirsalis]; which, in the original IAU nomenclature terminated at [/De%20Vico De Vico] A.
Images
LPOD Photo Gallery Lunar Orbiter Images
Maps
([/LAC%20zone LAC zone] 92A4) LAC map Geologic map
Description
Description: Elger
([/IAU%20Directions IAU Directions]) [/Rimae%20Sirsalis SIRSALIS].-- ... One of the longest clefts on the visible surface runs immediately E. of this formation. Commencing at a minute crater on the N. of it, it grazes the foot of the E. glacis; then, passing a pair of small overlapping craters (resembling Sirsalis and its companion in miniature), it runs through a very rugged country to a ring-plain W. of [/De%20Vico De Vico] (De Vico a), which it traverses, and, still following a southerly course, extends towards [/Byrgius Byrgius], in the neighbourhood of which it is apparently lost at a ridge, though Schmidt and Gaudibert have traced it still farther in the same direction.
Additional Information
Nomenclature
- Named after the nearby crater ([/Byrgius Byrgius]).
- Mary Blaggs's [/Collated%20List Collated List] of 1913 noted three rilles near [/Byrgius Byrgius]: catalog entries 2055, 2056 and 2057.
- In the original IAU nomenclature of [/Blagg%20and%20M%C3%BCller Blagg and Müller] (1935), catalog entry 2057 became the Byrgius Cleft (a name attributed to Goodacre), while the other two rilles became Byrgius Ir and Byrgius IIr. Blagg and Müller were probably influenced by [/Neison%2C%201876 Neison], who had drawn catalog entry 2057 as an appoximately 330 km rille extending from [/De%20Vico De Vico] A to [/Lagrage Lagrage] C (Elger suggests Schmidt and Gaudibert may also have imagined seeing it extending in that direction).
- Byrgius Cleft is listed as having been Latinized to Rima Byrgius in [/IAU%20Transactions%20XIIB IAU Transactions XIIB] (1964), which is supposed to be a summary of the changes introduced in the [/System%20of%20Lunar%20Craters System of Lunar Craters]. However, the name does not appear on the accompanying [/Quad%20Maps Quad Maps], and in fact the Byrgius Cleft is drawn there as an extension of [/Rimae%20Sirsalis Rimae Sirsalis], and the other two rilles seem to have assigned to a newly named [/Rimae%20Darwin Rimae Darwin]. The depiction of the Byrgius Cleft as a continuous extension of the Sirsalis Cleft on the [/System%20of%20Lunar%20Craters System of Lunar Craters] maps is in accordance with Elger's description, and discounts Neison's claim of a further extension to the south (which seems to have been imaginary).
- Although there is no formal mention in the [/IAU%20Transactions IAU Transactions] of the name Rima Byrgius having been dropped, it is not listed in the [/IAU%20Planetary%20Gazetteer IAU Planetary Gazetteer], where the position and dimensions of [/Rimae%20Sirsalis Rimae Sirsalis] are large enough to encompass this region.
LPOD Articles
The Longest Rille A Rille Draped Across the Landscape A Long Graben
Bibliography
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u2
