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Encyclopedia > 82 Alkmene
82 Alkmene
Orbital characteristics 1
Orbit type Main belt
Semimajor axis 2.758 AU
Perihelion distance 2.138 AU
Aphelion distance 3.379 AU
Orbital period 4.58 years
Inclination 2.83°
Eccentricity 0.225
Physical characteristics 1
Diameter 61 km
Rotation period 3 12.999 hours
Spectral class S
Abs. magnitude 8.40
Albedo 4 0.208
History 2
Discoverer R. Luther, 1864

82 Alkmene (alk-mee'-nee) is a Main belt asteroid. It is probably a mixture of silicate rock and nickel-iron metals. In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The astronomical unit (AU or au or a. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... (This page refers to eccitricity in astrodynamics. ... For the geometric term, see diameter. ... A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ... In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... The hour was originally defined in Egypt as 1/24 of a day, based on their duo-decimal numbering system (which counted finger joints on each hand). ... In astronomy the term spectral class refers to classifying objects according to their spectral lines, which indicate an objects chemical composition. ... Approximately 17% of all known asteroids are of an S-type (for stony) composition. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ... The albedo is a measure of reflectivity of a surface or body. ... Karl Theodor Robert Luther (April 16, 1822 – February 15, 1900) was a German astronomer who searched for asteroids while working in Düsseldorf. ... 1864 was a leap year starting on Friday (see link for calendar). ... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... In chemistry, a silicate is a compound consisting of silicon and oxygen (SixOy), one or more metals, and possibly hydrogen. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic Atomic mass 58. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... Hot metal work from a blacksmith In chemistry, a metal (Greek: Metallon) is an element that readily forms ions (cations) and has metallic bonds, and metals are sometimes described as a lattice of positive ions (cations) in a cloud of electrons. ...


Alkmene was discovered by R. Luther on November 27, 1864 and named after Alcmene, the mother of Herakles in Greek mythology. Karl Theodor Robert Luther (April 16, 1822 – February 15, 1900) was a German astronomer who searched for asteroids while working in Düsseldorf. ... November 27 is the 331st day (332nd on leap years) of the year. ... 1864 was a leap year starting on Friday (see link for calendar). ... Alcmene, or Alkmênê (might of the moon) was, in ancient Greek mythology, the daughter of Electryon, king of Mycenae, and wife of Amphitryon. ... For the son of Alexander the Great, see Heracles (Macedon). ... Greek mythology comprises the collected legends of Greek gods, goddesses, heroes, and heroines, originally created and spread within an oral-poetic tradition. ...


A satellite has been suggested based on the lightcurve data. [1] Moons of solar system scaled to Earths Moon The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. ...



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81 Terpsichore is a large and very dark main belt asteroid. ... 83 Beatrix is a quite large asteroid orbiting in the inner part of the main asteroid belt. ...

The minor planets
Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.)

  Results from FactBites:
 
Update for (82) Alkmene - April 4/5, 2003 (321 words)
In the evening of April 4/5, 2003 a faint 10.8 mag star TYC 1899-01174-1 will be occulted by a 64 km asteroid (82) Alkmene.
This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.
Close finding chart (prepared in GUIDE8): * occulted star is in center - labeled with cross * field is 3.0x3.0 degrees * limiting magnitude is 12.5 * labeled stars have indicated SAO numbers * remarks: Second chart is 30' blowup to show correctly the target star in the field.
RASNZ Occultation Section - Alkmene Occultation Update (455 words)
OCCULTATION BY (82) ALKMENE - 2003 FEB 19
UPDATE: 2003 FEB 10, 17:57 UT On the evening of 2003 Feb 19 UT, the 61 km diameter asteroid (82) Alkmene will occult a 9.9 mag star in the constellation Gemini for observers along a path across W Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 11.5 mag (the magnitude of the asteroid) for at most 19.4 seconds.
  More results at FactBites »


 
 

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