Difference between revisions of "Thebit"
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| − | [http://www.lpod.org/coppermine/displayimage.php?pid=2889&fullsize=1 [[Image: | + | [http://www.lpod.org/coppermine/displayimage.php?pid=2889&fullsize=1 [[Image:Normal_thebit_050807_04h52tu.jpg|external image normal_thebit_050807_04h52tu.jpg]]]<br /> ''[http://lpod.org/coppermine/displayimage.php?pos=-2889 François Emond]''<br /> <br /> |
==Images== | ==Images== | ||
[http://www.lpod.org/coppermine/thumbnails.php?album=search&type=full&search=Thebit LPOD Photo Gallery] [http://www.lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?Thebit%7C0 Lunar Orbiter Images] [http://www.lpi.usra.edu/resources/apollo/search/feature/?feature=Thebit Apollo Images]<br /> <br /> '''Orbital Apollo photographs of Thebit'''<br /> - Apollo 12's south looking color-''Hasselblad'' frames [http://www.lpi.usra.edu/resources/apollo/frame/?AS12-51-7579 AS12-51-7579] and [http://www.lpi.usra.edu/resources/apollo/frame/?AS12-51-7580 7580] show '''Thebit''' very near the central part of the curved horizon.<br /> - '''Thebit''' was also captured on the last 11 frames of [http://www.lpi.usra.edu/resources/apollo/catalog/metric/revolution/?AS16R26 REV 26], made by Apollo 16's south looking mapping-metric ''Fairchild'' camera. On these frames, '''Thebit''' is noticeable very near the curved horizon, close to the morning terminator.<br /> - [http://www.lpi.usra.edu/resources/apollo/frame/?AS16-M-2479 AS16-M-2479] of [http://www.lpi.usra.edu/resources/apollo/catalog/metric/revolution/?AS16R48 REV 48] shows '''Thebit''' near the central part of the curved horizon.<br /> - Note that it is possible to create wonderful 3D-Stereo views of '''Thebit''' when the oblique ''Fairchild'' frames are rotated 90 degrees clockwise.<br /> - Research Apollo photography: Danny Caes<br /> <br /> | [http://www.lpod.org/coppermine/thumbnails.php?album=search&type=full&search=Thebit LPOD Photo Gallery] [http://www.lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?Thebit%7C0 Lunar Orbiter Images] [http://www.lpi.usra.edu/resources/apollo/search/feature/?feature=Thebit Apollo Images]<br /> <br /> '''Orbital Apollo photographs of Thebit'''<br /> - Apollo 12's south looking color-''Hasselblad'' frames [http://www.lpi.usra.edu/resources/apollo/frame/?AS12-51-7579 AS12-51-7579] and [http://www.lpi.usra.edu/resources/apollo/frame/?AS12-51-7580 7580] show '''Thebit''' very near the central part of the curved horizon.<br /> - '''Thebit''' was also captured on the last 11 frames of [http://www.lpi.usra.edu/resources/apollo/catalog/metric/revolution/?AS16R26 REV 26], made by Apollo 16's south looking mapping-metric ''Fairchild'' camera. On these frames, '''Thebit''' is noticeable very near the curved horizon, close to the morning terminator.<br /> - [http://www.lpi.usra.edu/resources/apollo/frame/?AS16-M-2479 AS16-M-2479] of [http://www.lpi.usra.edu/resources/apollo/catalog/metric/revolution/?AS16R48 REV 48] shows '''Thebit''' near the central part of the curved horizon.<br /> - Note that it is possible to create wonderful 3D-Stereo views of '''Thebit''' when the oblique ''Fairchild'' frames are rotated 90 degrees clockwise.<br /> - Research Apollo photography: Danny Caes<br /> <br /> | ||
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==Description: Elger== | ==Description: Elger== | ||
| − | ''([[IAU% | + | ''([[IAU%20directions|IAU Directions]])'' THEBIT.--A fine ring-plain, 32 miles in diameter, on the mountainous E. margin of the [[Mare%20Nubium|Mare Nubium]], N.W. of [[Purbach|Purbach]]. Its irregular rampart is prominently terraced, and its continuity on the N.W. interrupted by a large deep crater (Thebit A), at least 9 miles in diameter, which has in its turn a smaller crater, of about half this size, on its margin, and a small central mountain within, which was once considered a good optical test, though it is not a difficult object in a 4 inch achromatic, if it is looked for at a favourable phase. The border of Thebit rises at one place on the N.E. to a height of nearly 10,000 feet above the interior, which includes much detail. The W. wall of Thebit A attains the same height above its floor, which is depressed more than 5,000 feet below the Mare.<br /> <br /> ''Note: the smaller crater that Elger mentions on the margin of Thebit A is now known as Thebit L.'' Research Danny Caes.<br /> <br /> |
==Description: Wikipedia== | ==Description: Wikipedia== | ||
[http://en.wikipedia.org/wiki/Thebit_(crater) Thebit]<br /> <br /> | [http://en.wikipedia.org/wiki/Thebit_(crater) Thebit]<br /> <br /> | ||
==Additional Information== | ==Additional Information== | ||
| − | * Depth data from [[Kurt%20Fisher% | + | * Depth data from [[Kurt%20Fisher%20Crater%20Depths|Kurt Fisher database]] |
** Westfall, 2000: 3.27 km | ** Westfall, 2000: 3.27 km | ||
** Viscardy, 1985: 3.27 km | ** Viscardy, 1985: 3.27 km | ||
** Cherrington, 1969: 3.16 km | ** Cherrington, 1969: 3.16 km | ||
* Central peak height | * Central peak height | ||
| − | ** [[Sekiguchi%2C%201972|Sekiguchi, 1972]]: 0.5 km <span class="membersnap">- [http://www.wikispaces.com/user/view/fatastronomer [[Image: | + | ** [[Sekiguchi%2C%201972|Sekiguchi, 1972]]: 0.5 km <span class="membersnap">- [http://www.wikispaces.com/user/view/fatastronomer [[Image:Fatastronomer-lg.jpg|16px|fatastronomer]]] [http://www.wikispaces.com/user/view/fatastronomer fatastronomer]</span> |
* Satellite crater '''Thebit A''' is on the [[ALPO%20list%20of%20bright%20ray%20craters|ALPO list of bright ray craters]]. | * Satellite crater '''Thebit A''' is on the [[ALPO%20list%20of%20bright%20ray%20craters|ALPO list of bright ray craters]]. | ||
* Satellite crater Thebit A is on the [[ALPO%20list%20of%20banded%20craters|ALPO list of banded craters]] | * Satellite crater Thebit A is on the [[ALPO%20list%20of%20banded%20craters|ALPO list of banded craters]] | ||
Revision as of 03:19, 16 April 2018
Contents
Thebit
|
Lat: 22.0°S, Long: 4.0°W, Diam: 56 km, Depth: 3.27 km, Rükl: 55, Upper Imbrian |
Images
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
Orbital Apollo photographs of Thebit
- Apollo 12's south looking color-Hasselblad frames AS12-51-7579 and 7580 show Thebit very near the central part of the curved horizon.
- Thebit was also captured on the last 11 frames of REV 26, made by Apollo 16's south looking mapping-metric Fairchild camera. On these frames, Thebit is noticeable very near the curved horizon, close to the morning terminator.
- AS16-M-2479 of REV 48 shows Thebit near the central part of the curved horizon.
- Note that it is possible to create wonderful 3D-Stereo views of Thebit when the oblique Fairchild frames are rotated 90 degrees clockwise.
- Research Apollo photography: Danny Caes
Maps
(LAC zone 95A3) LAC map Geologic map
Description
Description: Elger
(IAU Directions) THEBIT.--A fine ring-plain, 32 miles in diameter, on the mountainous E. margin of the Mare Nubium, N.W. of Purbach. Its irregular rampart is prominently terraced, and its continuity on the N.W. interrupted by a large deep crater (Thebit A), at least 9 miles in diameter, which has in its turn a smaller crater, of about half this size, on its margin, and a small central mountain within, which was once considered a good optical test, though it is not a difficult object in a 4 inch achromatic, if it is looked for at a favourable phase. The border of Thebit rises at one place on the N.E. to a height of nearly 10,000 feet above the interior, which includes much detail. The W. wall of Thebit A attains the same height above its floor, which is depressed more than 5,000 feet below the Mare.
Note: the smaller crater that Elger mentions on the margin of Thebit A is now known as Thebit L. Research Danny Caes.
Description: Wikipedia
Additional Information
- Depth data from Kurt Fisher database
- Westfall, 2000: 3.27 km
- Viscardy, 1985: 3.27 km
- Cherrington, 1969: 3.16 km
- Central peak height
- Sekiguchi, 1972: 0.5 km - fatastronomer fatastronomer
- Satellite crater Thebit A is on the ALPO list of bright ray craters.
- Satellite crater Thebit A is on the ALPO list of banded craters
Nomenclature
- Named for Abu'l Hasan Thabit ibn Qurra' ibn Marwan al-Sabi al-Harrani (836 – February 18, 901), an Arab astronomer and mathematician, who was known as Thebit in Latin.
- This name has continued unchanged since its original usage for this feature on Riccioli's map (Whitaker, p. 215).
- The large (more-or-less circle shaped) region immediately westward of Thebit (in which Birt and Rupes Recta are located) is often (unofficially) called Ancient Thebit.
LPOD Articles
Bibliography
- Wood, C.A. 20__. Ancient Thebit and Huygens's Sword. S&T Online Article.
