2014 HA 200
Asteroid 2014 HA 200 |
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Properties of the orbit ( animation ) | |
Orbit type |
SDO or "Distant Object" |
Major semi-axis | 56.265 AU |
eccentricity | 0.346 |
Perihelion - aphelion | 36.811 AU - 75.719 AU |
Inclination of the orbit plane | 10.4 ° |
Length of the ascending node | 171.1 ° |
Argument of the periapsis | 137.8 ° |
Time of passage of the perihelion | June 8, 2070 |
Sidereal period | 422 a 0.6 M. |
Mean orbital velocity | 3.938 km / s |
Physical Properties | |
Medium diameter | approx. 513 km |
Albedo | 0.08-0.09 |
Absolute brightness | 4.7 - 4.9 mag |
history | |
Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
Date of discovery | April 29, 2014 |
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. |
2014 HA 200 is a large trans-Neptunian object , which is classified dynamically as a scattered disc object or more generally as a "distant object" . Because of its size, the asteroid is a dwarf planet candidate .
discovery
2014 HA 200 was discovered on April 29, 2014 by a team of astronomers consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman with the 1.8 m Pan-STARRS telescope (PS1 ) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016.
After its discovery, HA 200 could be identified on photos up to February 26, 2010, which were also taken at the Pan-STARRS telescope , in 2014 , and thus its observation period was extended by 4 years in order to calculate its orbit more precisely. In September 2018, there were a total of 249 observations over a period of 9 years. The last observation so far was carried out in April 2018 at the Pan-STARRS telescope. (As of February 9, 2019)
properties
Orbit
2014 HA 200 orbits the sun in 422.05 years in a strongly elliptical orbit between 36.81 AU and 75.72 AU from its center. The orbit eccentricity is 0.346, the orbit is 10.38 ° inclined to the ecliptic . The planetoid is currently 46.88 AU from the Sun and 46.86 AU from Earth . He will next pass perihelion in 2070, so the last perihelion should have occurred in 1648.
Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as an SDO ; the latter is generally referred to as a "distant object" .
size
A diameter of around 513 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 4.9 m . The apparent magnitude of 2014 HA 200 is 21.66 m .
Since it can be assumed that 2014 HA 200 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown assumes that 2014 HA 200 is likely a dwarf planet.
year | Dimensions km | source |
---|---|---|
2018 | 509.0 | Johnston |
2018 | 513.0 | Brown |
The most precise determination is marked in bold . |
See also
- List of trans-Neptunian objects
- List of dwarf planets of the solar system
- List of asteroids
- List of moons from asteroids
Web links
- How many dwarf planets are there in the outer solar system? Current list of the largest TNOs from Mike Brown
- Free the dwarf planets! Mike Brown's column on the IAU and the dwarf planets regarding their classifications (23 August 2011)
Individual evidence
- ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 14HA200 . SwRI (Space Science Department). Retrieved February 9, 2019.
- ↑ a b c 2014 HA200 at the IAU Minor Planet Center (English) Retrieved on February 9, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-O138: 2014 HA200 . IAU . July 17, 2016. Retrieved February 9, 2019.
- ↑ 2014 HA200 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 9, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 9, 2019.
- ↑ 2014 HA200 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 9, 2019.
- ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 9, 2019.