Lyot (lunar crater)
Lyot is a large lunar impact crater that is located along the southeastern limb of the Moon. It lies within the irregular and patchy lunar mare named Mare Australe, and to the south of the crater Hamilton. Due to its location, this formation is viewed at a low angle from the Earth, and its visibility is affected by libration.
 Apollo 15 image | |
| Coordinates | 49.8°S 84.5°E |
|---|---|
| Diameter | 132 km |
| Depth | Unknown |
| Colongitude | 279° at sunrise |
| Eponym | Bernard F. Lyot |
LRO mosaic
The interior floor of this crater has been resurfaced by lava, leaving a dark interior with an albedo that matches the surrounding mare. The outer rim is low and heavily worn, with a perimeter that forms a somewhat distorted circle. The southwest part of the floor and rim is marked by several small, bowl-shaped craters. There is also the remains of a ghost crater to the east of the crater midpoint.
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 Lyot.
| Lyot | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 49.0° S | 79.6° E | 38 km |
| B | 50.4° S | 82.2° E | 9 km |
| C | 50.4° S | 80.4° E | 17 km |
| D | 51.6° S | 82.2° E | 14 km |
| E | 52.0° S | 82.9° E | 13 km |
| F | 52.3° S | 82.8° E | 21 km |
| H | 51.4° S | 78.2° E | 63 km |
| L | 54.4° S | 83.1° E | 70 km |
| M | 53.3° S | 86.2° E | 24 km |
| N | 52.8° S | 83.4° E | 12 km |
| P | 47.7° S | 85.0° E | 13 km |
| R | 46.1° S | 87.6° E | 30 km |
| S | 46.0° S | 85.6° E | 26 km |
| T | 46.8° S | 78.6° E | 8 km |
gollark: POST data isn't in the URL though, it's sent as the body.
gollark: The reason they *do* is probably just consistency with other methods (it would be very annoying if they worked very differently to GET routing-wise) and so requests can be routed to the right handler more easily.
gollark: <@498244879894315027> Why wouldn't (shouldn't?) they have a URL?
gollark: They do have to spin pretty fast. There are sealed helium ones now.
gollark: > The HDD's spindle system relies on air density inside the disk enclosure to support the heads at their proper flying height while the disk rotates. HDDs require a certain range of air densities to operate properly. The connection to the external environment and density occurs through a small hole in the enclosure (about 0.5 mm in breadth), usually with a filter on the inside (the breather filter).[124] If the air density is too low, then there is not enough lift for the flying head, so the head gets too close to the disk, and there is a risk of head crashes and data loss. Specially manufactured sealed and pressurized disks are needed for reliable high-altitude operation, above about 3,000 m (9,800 ft).[125] Modern disks include temperature sensors and adjust their operation to the operating environment. Breather holes can be seen on all disk drives – they usually have a sticker next to them, warning the user not to cover the holes. The air inside the operating drive is constantly moving too, being swept in motion by friction with the spinning platters. This air passes through an internal recirculation (or "recirc") filter to remove any leftover contaminants from manufacture, any particles or chemicals that may have somehow entered the enclosure, and any particles or outgassing generated internally in normal operation. Very high humidity present for extended periods of time can corrode the heads and platters. https://en.wikipedia.org/wiki/Hard_disk_drive#Integrity
References
- Wood, Chuck (2007-01-08). "A Dome on the Limb". Lunar Photo of the Day. Archived from the original on 2007-09-27. Retrieved 2007-01-08.
- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.CS1 maint: ref=harv (link)
- Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.CS1 maint: ref=harv (link)
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.CS1 maint: ref=harv (link)
- Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1.CS1 maint: ref=harv (link)
- McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.CS1 maint: ref=harv (link)
- Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763.CS1 maint: ref=harv (link)
- Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.CS1 maint: ref=harv (link)
- Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.CS1 maint: ref=harv (link)
- Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.CS1 maint: ref=harv (link)
- Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.CS1 maint: ref=harv (link)
- Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.CS1 maint: ref=harv (link)
- Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.CS1 maint: ref=harv (link)
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