Almanon
Contents
Almanon
|
Lat: 16.85°S, Long: 15.14°E, Diam: 47.76 km, Depth: 2.48 km, [/R%C3%BCkl%2056 Rükl: 56] |
Table of Contents
LOIV 089 H2
Images
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Orbital Fairchild-Metric/Mapping photographs of Almanon, made during the mission of Apollo 16, are online in the oblique southward-looking frames of Magazine Rev 26) (Almanon's location is south-southeast of [/Abulfeda Abulfeda], the crater which is mentioned in the LPI's list).
- Research: Danny Caes
Maps
([/LAC%20zone LAC zone] 96A2) LAC map Geologic map
Description
Elger
([/IAU%20Directions IAU Directions]) ALMANON.--This ring-plain, with its companion [/Abulfeda Abulfeda] on the N.W., is a very interesting telescopic object. It is about 36 miles in diameter, and is surrounded by an irregular border of polygonal shape, the greatest altitude of which is about 6,000 feet above the floor on the E. It is slightly terraced, and is broken on the S. by a deep crater pertaining to the bright and large formation Tacitus b, the W. border of which casts a fine double-peaked shadow at sunrise. On the N.E. there is another bright crater, the largest of the row, running in a E.S.E. direction, and forming a E. extension of the remarkable crater-chain tangential to the borders of Almanon and [/Abulfeda Abulfeda]. The only objects on the floor are three little hills, in a line, near the centre, a winding ridge on the E. side of it, and two or three other low elevations.
Wikipedia
Additional Information
- IAU page: Almanon
- Depth data from [/Kurt%20Fisher%20crater%20depths Kurt Fisher database]
- Westfall, 2000: 2.48 km
- Viscardy, 1985: 2.48 km
- Cherrington, 1969: 2.01 km
- Satellite crater Almanon C is on the [/ALPO%20list%20of%20banded%20craters ALPO list of banded craters]
Nomenclature
- According to the [/IAU%20Planetary%20Gazetteer IAU Planetary Gazetteer] this feature is named for Abdalla Al Mamun (786-833), identified (even though the Wikipedia link describes him as an Abbasid caliph with no obvious astronomical connections) as "a Persian astronomer."
- The reason the name entered the [/IAU%20Nomenclature IAU Nomenclature] in [/Named%20Lunar%20Formations Named Lunar Formations] (catalog #3751, attributed to [/Riccioli Riccioli]) as Almanon is that Mary Blagg, in her [/Collated%20List Collated List], found this feature labeled that way by all three of her authorities,
- Kuiper et al., in [/PLA%20Table%20III Table III] of their [/Photographic%20Lunar%20Atlas Photographic Lunar Atlas], note that Almanon seems to be a misspelling by [/Beer%20and%20M%C3%A4dler Beer and Mädler] of the name Almaeon printed on Riccioli's map (under the second "T" in "Terra Sanitatis"), but recommend retaining the misspelling due to its long use. However, the name on Riccioli's map itself appears to a typographical error, which Beer and Mädler were perhaps trying to correct, for in Part 2 of his biographical Chronology Riccioli lists Almamon the caliph and Almaon son of the Persian astronomer Albumasar (787-886, see: digital copy of book by "Albumasar", noted on the bookplate as the most famous of Arabic astrologers), but no Almaeon. Both names listed in the Chronology differ by one letter from the spelling on the map. Almamon seems the more likely intent since in Part 1 of the Chronology Riccioli lists Almamon (next to the year 827) but neither Albumasar nor Almaon. Also, historian Lynn Thorndike is cited elsewhere as saying he thinks references to "Almeon" in medieval literature are to the caliph listed by the IAU, so Riccioli's mention of an otherwise unknown son of Albumasar named Almaon may be confused.
LPOD Articles
Bibliography
- Harold Hill. [/A%20Portfolio%20of%20Lunar%20Drawings A Portfolio of Lunar Drawings], pages 178, 179 (last stages of illumination on [/Geber Geber], Almanon, and [/Abulfeda Abulfeda]).
[/Alphabetical%20Index Named Featues] -- Prev: [/Al-Khwarizmi Al-Khwarizmi] -- Next: [/Al-Marrakushi Al-Marrakushi]
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u3
