(523706) 2014 HF 200

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Asteroid
(523706) 2014 HF 200
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 61.759  AU
eccentricity 0.426
Perihelion - aphelion 35,479 AU - 88,039 AU
Inclination of the orbit plane 9.7 °
Length of the ascending node 21.5 °
Argument of the periapsis 253.4 °
Time of passage of the perihelion November 6, 2034
Sidereal period 485 a 4.3 M
Mean orbital velocity 3.759 km / s
Physical Properties
Medium diameter approx. 302 km
Albedo 0.08-0.09
Absolute brightness 5.9 - 6.0 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery April 30, 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.

(523706) 2014 HF 200 is a large trans-Neptunian object in the Kuiper Belt , which is classified as a Scattered Disk Object (SDO) in terms of orbital dynamics . Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2014 HF 200 was discovered on April 30, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in images taken as part of the Pan-STARRS project with the 1 , 8-m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on May 20, 2012, discovered. The discovery was announced on July 17, 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number 523706 .

After its discovery in 2014, HF 200 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to May 18, 2010 and thus extended its observation period by four years in order to calculate its orbit more precisely. Since then, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, a total of 118 observations were made over a period of 9 years. The last observation so far was carried out again at the Pan-STARRS telescope in June 2017. (As of April 3, 2019)

properties

Orbit

2014 HF 200 orbits the sun in 485.36 years on a strongly elliptical orbit between 35.48  AU and 88.04 AU from its center. The orbit eccentricity is 0.426, the orbit is 9.71 ° inclined to the ecliptic . The planetoid is currently 37.05 AU from the Sun. He will next pass through perihelion in 2034, so the last perihelion should have occurred in 1549.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also generally lists it as a "distant object" .

size

A diameter of 302 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 6.0  m . Based on this diameter, the total surface area is around 287,000 km 2 . The apparent magnitude of the 2014 HF 200 is 21.65  m .

Since it is conceivable that 2014 HF 200 is in hydrostatic equilibrium due to its size and could therefore be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2014 HF 200 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 HF 200
year Dimensions km source
2018 293.0 Johnston
2018 302.0 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 523706 . SwRI (Space Science Department). Retrieved April 3, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved April 3, 2019.
  3. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved April 3, 2019.
  4. ↑ a b c (523706) 2014 HF200 at the IAU Minor Planet Center (English) Retrieved on April 3, 2019.
  5. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  6. ↑ MPC : MPEC 2016-O210: 2014 HF200 . IAU . July 17, 2016. Retrieved April 3, 2019.
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved April 3, 2019. Reference there: MPC 111779
  8. ↑ (523706) 2014 HF200 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved April 3, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ (523706) 2014 HF200 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  10. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved April 3, 2019.