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Encyclopedia > 2003 AZ84
2003 AZ84
Discovery
Discovered by: C. Trujillo, M. Brown,
E. Helin, S. Pravdo,
K. Lawrence, and M. Hicks
Discovery date: January 13, 2003
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion distance: 6964.422 Gm (46.554 AU)
Perihelion distance: 4833.387 Gm (32.309 AU)
Semi-major axis: 5898.905 Gm (39.432 AU)
Eccentricity: 0.181
Orbital period: 90441.418 d (247.62 a)
Avg. orbital speed: 4.70 km/s
Mean anomaly: 214.954°
Inclination: 13.595°
Longitude of ascending node: 252.139°
Argument of perihelion: 14.917°
Satellites: 1 (68 km)
Physical characteristics
Dimensions: 686 km[1]
Volume: 2.04×108 km³
Mass: 4.1×1020? kg
Mean density: 2.0? g/cm³
Equatorial surface gravity: 0.2040? m/s²
Escape velocity: 0.3859? km/s
Albedo: 0.10?
Temperature: ~44 K
Spectral type: B-V=0.70; V-R=0.36[2]
Absolute magnitude: 3.82

2003 AZ84, also written as 2003 AZ84, is a Trans-Neptunian object. It was discovered on January 13, 2003 by C. Trujillo, M. Brown, E. Helin, S. Pravdo, K. Lawrence, and M. Hicks at the Palomar Observatory using the Schmidt telescope. It is classified as a plutino, which means that it is in a 3:2 orbital resonance with Neptune, similar to that of Pluto. It orbits the sun just under 248 Earth years. Chadwick A. Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Edgeworth-Kuiper belt and the outer solar system. ... Michael (Mike) E. Brown (born c. ... Eleanor Francis Helin is an American astronomer, principal investigator of the Near Earth Asteroid Tracking (NEAT) program of NASAs Jet Propulsion Laboratory. ... Kenneth J. Lawrence is an American astronomer. ... January 13 is the 13th day of the year in the Gregorian calendar. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... m. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... December 31 is the 365th day of the year (366th in leap years) in the Gregorian calendar. ... For the Manfred Mann album, see 2006 (album). ... The Julian day or Julian day number (JDN) is the (integer) number of days that have elapsed since Monday, January 1, 4713 BC in the proleptic Julian calendar [1]. That day is counted as Julian day zero. ... A diagram of Keplerian orbital elements. ... A diagram of Keplerian orbital elements. ... The semi-major axis of an ellipse In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae. ... Look up giga- in Wiktionary, the free dictionary. ... The or meter (see spelling differences) is a measure of length. ... The astronomical unit (AU or au or a. ... (This page refers to eccitricity in astrodynamics. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... Look up day in Wiktionary, the free dictionary. ... In astronomy, a Julian year is a unit of time defined as exactly 365. ... The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. ... Look up second in Wiktionary, the free dictionary. ... In the study of orbital dynamics the mean anomaly is a measure of time, specific to the orbiting body p, which is a multiple of 2π radians at and only at periapsis. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1/360 of a full rotation. ... The Longitude of the ascending node (☊, also noted Ω) is one of the orbital elements used to specify the orbit of an object in space. ... The argument of periapsis (ω) is the orbital element describing the angle between an orbiting bodys ascending node (the point where the body crosses the plane of reference from South to North) and its periapsis (the point of closest approach to the central body), measured in the orbital plane and... A natural satellite is an object that orbits a planet or other body larger than itself and which is not man-made. ... 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). ... The volume of a solid object is the three-dimensional concept of how much space it occupies, often quantified numerically. ... Unsolved problems in physics: What causes anything to have mass? The U.S. National Prototype Kilogram, which currently serves as the primary standard for measuring mass in the U.S. Mass is the property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... The U.S. National Prototype Kilogram, which currently serves as the primary standard for measuring mass in the U.S. It was assigned to the United States in 1889 and is periodically recertified and traceable to the primary international standard, The Kilogram, held at the Bureau International des Poids et... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... The surface gravity of a Killing horizon is the acceleration, as exerted at infinity, needed to keep an object at the horizon. ... Space Shuttle Atlantis launches on mission STS-71. ... Albedo is the ratio of reflected to incident electromagnetic radiation power. ... Fig. ... The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us, in the absence of interstellar extinction. ... A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. ... January 13 is the 13th day of the year in the Gregorian calendar. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Chadwick A. Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Edgeworth-Kuiper belt and the outer solar system. ... Michael (Mike) E. Brown (born c. ... Eleanor Francis Helin is an American astronomer, principal investigator of the Near Earth Asteroid Tracking (NEAT) program of NASAs Jet Propulsion Laboratory. ... Kenneth J. Lawrence is an American astronomer. ... Palomar Observatory is a privately-owned observatory located in San Diego County, California, 90 miles (145 km) southeast of Mount Wilson Observatory, on Palomar Mountain. ... In astronomy, a plutino is a trans-Neptunian object that has a 3:2 orbital resonance with Neptune. ... In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other. ... Adjectives: Neptunian Atmosphere Surface pressure: ≫ 100 kPa (cloud level) Composition: 80% ± 3. ... Adjectives: Plutonian Atmosphere Surface pressure: 0. ...


Satellite

The discovery of a satellite of 2003 AZ84 was reported in IAUC 8812 on 22 February 2007[1]. The orbit of this satellite has yet to be determined, but was measured with a separation of 0.22 arcsec and a magnitude difference of 5.0 mag. 243 Ida and its moon Dactyl An asteroid moon is an asteroid that orbits another asteroid. ... February 22 is the 53rd day of the year in the Gregorian calendar. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the CE era. ...


References

  1. ^ http://www.johnstonsarchive.net/astro/tnoslist.html
  2. ^ http://www.physics.nau.edu/~tegler/research/survey.htm


 
 

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