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2003 AZ84
 
 
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, also written as 2003 AZ84, is a Trans-Neptunian object
Trans-Neptunian object

A trans-Neptunian object is any object in the solar system that orbits the sun at a greater distance on average than Neptune . The Kuiper belt, scattered disk, and Oort cloud are three divisions of this volume of space....
. It was discovered on January 13, 2003 by C. Trujillo, M. Brown
Michael E. Brown

Michael E. Brown has been a professor of planetary astronomy at the California Institute of Technology since 2003. He was previously an associate professor at Caltech from 2002-2003 and an assistant professor at Caltech from 1997?2002....
, E. Helin
Eleanor F. Helin

Eleanor Francis Helin was an American astronomer. She was principal investigator of the Near Earth Asteroid Tracking program of NASA's Jet Propulsion Laboratory....
, S. Pravdo, K. Lawrence
Kenneth J. Lawrence

Kenneth J. Lawrence is an American astronomer.He has discovered numerous asteroids, and also co-discovered periodic comet 152P/Helin-Lawrence. The asteroid 4969 Lawrence is named in his honor....
, and M. Hicks at the Palomar Observatory
Palomar Observatory

Palomar Observatory is a privately owned observatory located in San Diego County, California, 90 miles southeast of Mount Wilson Observatory, on Palomar Mountain in the Palomar Mountain Range....
 using the Schmidt telescope.

s classified as a plutino
Plutino

In astronomy, a plutino is a trans-Neptunian object in 2:3 orbital resonance with Neptune . For every 2 orbits that a Plutino makes, Neptune orbits 3 times....
, which means that it is in a 3:2 orbital resonance
Orbital resonance

In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other, usually due to their orbital periods being related by a ratio of two small integers....
 with Neptune
NEPTUNE

=Overview=The project, along with sister project, VENUS, offers a unique approach to ocean science. Traditionally, ocean scientists have relied on infrequent ship cruises or space-based satellites to carry out their research....
, similar to that of Pluto
Pluto

Pluto , Minor planet names Pluto, is the second-largest known dwarf planet in the Solar System and the tenth-largest body observed directly orbiting the Sun....
. It orbits the sun just under 248 Earth years.

discovery of a satellite
Asteroid moon

An asteroid moon is an asteroid that orbits another asteroid as its natural satellite. It is thought that many asteroids may possess moons, in some cases quite substantial in size....
 of was reported in IAUC 8812 on 22 February 2007.






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, also written as 2003 AZ84, is a Trans-Neptunian object
Trans-Neptunian object

A trans-Neptunian object is any object in the solar system that orbits the sun at a greater distance on average than Neptune . The Kuiper belt, scattered disk, and Oort cloud are three divisions of this volume of space....
. It was discovered on January 13, 2003 by C. Trujillo, M. Brown
Michael E. Brown

Michael E. Brown has been a professor of planetary astronomy at the California Institute of Technology since 2003. He was previously an associate professor at Caltech from 2002-2003 and an assistant professor at Caltech from 1997?2002....
, E. Helin
Eleanor F. Helin

Eleanor Francis Helin was an American astronomer. She was principal investigator of the Near Earth Asteroid Tracking program of NASA's Jet Propulsion Laboratory....
, S. Pravdo, K. Lawrence
Kenneth J. Lawrence

Kenneth J. Lawrence is an American astronomer.He has discovered numerous asteroids, and also co-discovered periodic comet 152P/Helin-Lawrence. The asteroid 4969 Lawrence is named in his honor....
, and M. Hicks at the Palomar Observatory
Palomar Observatory

Palomar Observatory is a privately owned observatory located in San Diego County, California, 90 miles southeast of Mount Wilson Observatory, on Palomar Mountain in the Palomar Mountain Range....
 using the Schmidt telescope.

Orbit

It is classified as a plutino
Plutino

In astronomy, a plutino is a trans-Neptunian object in 2:3 orbital resonance with Neptune . For every 2 orbits that a Plutino makes, Neptune orbits 3 times....
, which means that it is in a 3:2 orbital resonance
Orbital resonance

In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other, usually due to their orbital periods being related by a ratio of two small integers....
 with Neptune
NEPTUNE

=Overview=The project, along with sister project, VENUS, offers a unique approach to ocean science. Traditionally, ocean scientists have relied on infrequent ship cruises or space-based satellites to carry out their research....
, similar to that of Pluto
Pluto

Pluto , Minor planet names Pluto, is the second-largest known dwarf planet in the Solar System and the tenth-largest body observed directly orbiting the Sun....
. It orbits the sun just under 248 Earth years.

Satellite

The discovery of a satellite
Asteroid moon

An asteroid moon is an asteroid that orbits another asteroid as its natural satellite. It is thought that many asteroids may possess moons, in some cases quite substantial in size....
 of was reported in IAUC 8812 on 22 February 2007. The orbit of this satellite has yet to be determined, but was measured with a separation of 0.22 arcsec
Minute of arc

A minute of arc, arcminute, or MOA is a unit of angle, equal to one sixtieth of one degree . Since one degree is defined as one three hundred sixtieth of a circle, 1 minute of arc is 1/21600 of the amount of arc in a closed circle....
 and an apparent magnitude
Apparent magnitude

The apparent magnitude of a celestial body is a measurement of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the Earth's atmosphere....
 difference of 5.0. It is estimated to be about 68 ± 20 km in diameter.