31 relations: Apsis, Argument of periapsis, Astronomical unit, California Institute of Technology, Clearing the neighbourhood, Degree (angle), Detached object, Dwarf planet, Jack J. Lissauer, Jet Propulsion Laboratory, JPL Horizons On-Line Ephemeris System, Julian day, Julian year (astronomy), Kelvin, List of Solar System objects by greatest aphelion, List of Solar System objects most distant from the Sun in 2015, Marc William Buie, Michael E. Brown, Minor Planet Center, Neptune, Planet, Planet Nine, Planetary system, Planets beyond Neptune, Scattered disc, Second, Semi-major and semi-minor axes, Solar System, Sun, Trans-Neptunian object, 90377 Sedna.
An apsis (ἁψίς; plural apsides, Greek: ἁψῖδες) is an extreme point in the orbit of an object.
The argument of periapsis (also called argument of perifocus or argument of pericenter), symbolized as ω, is one of the orbital elements of an orbiting body.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
The California Institute of Technology (abbreviated Caltech)The university itself only spells its short form as "Caltech"; other spellings such as.
"Clearing the neighbourhood around its orbit" is a criterion for a celestial body to be considered a planet in the Solar System.
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.
Detached objects are a dynamical class of minor planets in the outer reaches of the Solar System and belong to the broader family of trans-Neptunian objects (TNOs).
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.
Jack Jonathan Lissauer (born 1957) is an American research scientist who has worked for NASA's Ames Research Center since 1996.
The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in Pasadena, California, United States, with large portions of the campus in La Cañada Flintridge, California.
JPL Horizons On-Line Ephemeris System provides easy access to key Solar System data and flexible production of highly accurate ephemerides for Solar System objects.
Julian day is the continuous count of days since the beginning of the Julian Period and is used primarily by astronomers.
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
This is a list of Solar System objects by greatest aphelion or the greatest distance from the Sun that the orbit takes it.
This is a list of Solar System objects most distant from the Sun discovered by December of 2015. The objects are sorted by their approximate heliocentric distance from the Sun in December 2015 (as opposed to those with the greatest calculated aphelion in their orbit).
Marc William Buie (born 1958) is an American astronomer and prolific discoverer of minor planets, who used to be at Lowell Observatory in Flagstaff, Arizona, and also the Sentinel Space Telescope Mission Scientist for the B612 Foundation, which is dedicated to protecting Earth from asteroid impact events.
Michael E. Brown (born June 5, 1965) is an American astronomer, who has been professor of planetary astronomy at the California Institute of Technology (Caltech) since 2003.
The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids and comets), calculating their orbits and publishing this information via the Minor Planet Circulars.
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
Planet Nine is a hypothetical planet in the outer region of the Solar System.
A planetary system is a set of gravitationally bound non-stellar objects in or out of orbit around a star or star system.
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit.
The scattered disc (or scattered disk) is a distant circumstellar disc in the Solar System that is sparsely populated by icy small solar system bodies, and are a subset of the broader family of trans-Neptunian objects.
The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.
The Solar SystemCapitalization of the name varies.
The Sun is the star at the center of the Solar System.
A trans-Neptunian object (TNO, also written transneptunian object) is any minor planet in the Solar System that orbits the Sun at a greater average distance (semi-major axis) than Neptune, 30 astronomical units (AU).
90377 Sedna is a large minor planet in the outer reaches of the Solar System that was,, at a distance of about 86 astronomical units (AU) from the Sun, about three times as far as Neptune.