2014 HA 200

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Asteroid
2014 HA 200
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
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.

Provisions of the diameter for 2014 HA 200
year Dimensions km source
2018 509.0 Johnston
2018 513.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 14HA200 . SwRI (Space Science Department). Retrieved February 9, 2019.
  2. ↑ a b c 2014 HA200 at the IAU Minor Planet Center (English) Retrieved on February 9, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2016-O138: 2014 HA200 . IAU . July 17, 2016. Retrieved February 9, 2019.
  5. ↑ 2014 HA200 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 9, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  6. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 9, 2019.
  7. ↑ 2014 HA200 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  8. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 9, 2019.
  9. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 9, 2019.