- List of albedo features on Mercury
This is a list of the
albedo featuresof the planet Mercury as seen by early telescopic observation.
Early telescopic observations of Mercury were based on the assumption that Mercury keeps one of its faces permanently turned toward the
Sun, through the mechanism of tidal locking. Although this is not true (Mercury rotates three times on its axis for every two revolutions around the Sun), when it is positioned for best viewing from Earth, the amount by which its visible face has rotated from its previous best viewing position is fairly small.
A map of Mercury [ [http://history.nasa.gov/SP-423/p15a.htm Antoniadi's map of Mercury] ] made in the 1910s by astronomer
Eugène Michel Antoniadishows the following albedo features, localized by a grid in which 0° longitude is the (assumed) subsolar meridian. No certain connection has been made between these features and the topographic features viewed on Mercury by the Mariner 10spacecraft. Mariner 10, however, imaged less than half of Mercury's surface.
The names are drawn from
Greek mythology, and often allude to myths about Hermes, the Greek equivalent of the Roman god Mercury.
The names of albedo features currently used by the [http://planetarynames.wr.usgs.gov/jsp/FeatureTypesData2.jsp?systemID=1&bodyID=9&typeID=1&system=Mercury&body=Mercury&type=Albedo%20Feature&sort=AName&show=Fname&show=Lat&show=Long&show=Diam&show=Stat&show=Orig Gazetteer of Planetary Nomenclature] are largely based upon Antoniadi's names, but include several alterations; they also necessarily use a different coordinate grid.
The newer regional names are: "Borea" (IPA|/ˈbɔəriə/) "Northern region"; "Australia" (IPA|/ɔːˈstreɪliə/) "Southern region"; and "Tricrena" (IPA|/trɨˈkriːnə/), the name of a mountain near Pheneus in
Other changes are: all features named "Vallis" and "Promontorium" have been renamed "Solitudo"; "Solitudo Argiphontae" has been renamed "Sinus Argiphontae" ("bay of Argiphontes"); "Admeti" has been changed to "Admetei" (in error; there is no mythological figure "Admeteus"); "Pleias" has become "Pleias Gallia".
Wikimedia Foundation. 2010.
Look at other dictionaries:
List of geological features on Mercury — is an itemization of mountains, valleys, and other landform features of the planet Mercury. Different types of features are named after different things: Mercurian ridges are called dorsa, and are named after astronomers who made detailed studies … Wikipedia
Classical albedo features on Mars — Mars, as seen through a small telescope, showing the patterns of colour known as albedo features. The classical albedo features of Mars are the light and dark features that can be seen on the planet Mars through an Earth based telescope. Before… … Wikipedia
Albedo feature — An albedo feature is a large area on the surface of a planet (or other solar system body) which shows a contrast in brightness or darkness (albedo) with adjacent areas.Historically, albedo features were the very first (and usually only) features… … Wikipedia
List of craters on Mercury — This is a list of named craters on Mercury. Most Mercurian craters are named after famous writers and artists. Craters larger than 250 km in diameter are referred to as basins . Terminology As on the Moon and Mars, sequences of craters… … Wikipedia
Mercury (planet) — Mercury ☿ … Wikipedia
List of Mercury-crossing minor planets — A Mercury crosser is an asteroid whose orbit crosses that of Mercury. The Mercury crossers proper have aphelia outside Mercury s (0.4667 AU) and perihelia inside Mercury s (0.3075 AU), while those listed here as outer grazers have perihelia… … Wikipedia
List of Mars-crossing minor planets — A Mars crosser is an asteroid whose orbit crosses that of Mars. The known numbered Mars crossers are listed here. They include the two numbered Mars trojans 5261 Eureka and (101429) 1998 VF31. Many databases, for instance the Jet Propulsion… … Wikipedia
List of craters on Mars — Opportunity rover (MER B) images Burns Cliff inside Endurance Crater in 2004 (NASA). There are hundreds of thousands of craters on Mars larger than 1 km, but only about 1000 of them have names. Names are assigned by the International Astronomical … Wikipedia
Mercury's magnetic field — Magnetosphere of Mercury Graph showing relative strength of Mercury s magnetic field. Discovery … Wikipedia
Mercury's moon — A moon orbiting Mercury was, for a short time, believed to exist. On March 27, 1974, two days before Mariner 10 made its flyby of Mercury, instruments began registering large amounts of ultraviolet radiation in the vicinity of Mercury which,… … Wikipedia