(523772) 2014 XR 40

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Asteroid
(523772) 2014 XR 40
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO ) or
CKBO ( «Hot» ),
«Distant Object»
Major semi-axis 43,014  AU
eccentricity 0.145
Perihelion - aphelion 36.787 AU - 49.241 AU
Inclination of the orbit plane 24.8 °
Length of the ascending node 3.1 °
Argument of the periapsis 280.5 °
Time of passage of the perihelion December 10, 2090
Sidereal period 282 a 1.3 M.
Mean orbital velocity 4.504 km / s
Physical Properties
Medium diameter approx. 457 km
Albedo 0.06-0.09
Absolute brightness 5.2 - 5.4 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 2nd December 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.

(523772) 2014 XR 40 is a large trans-Neptunian object in the Kuiper belt , which is classified as an extended Scattered Disc Object (DO) or as a Cubewano in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 XR 40 was used on December 2, 2014 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman as part of the Pan-STARRS project with the 1.8 m Ritchey -Chretien Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016 the asteroid was on 25 September 2018 the IAU , the minor planet number 523772 .

After its discovery, the XR 40 could be identified in photos up to May 27, 2010, which were also taken as part of the Pan-STARRS program, and its observation period was extended by four years in order to calculate its orbit more precisely. In October 2018, a total of 157 observations were made over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in April 2018. (As of March 1, 2019)

properties

Orbit

2014 XR 40 orbits the sun in 282.11 years on a slightly elliptical orbit between 36.79  AU and 49.24 AU from its center. The orbit eccentricity is 0.144, the orbit is inclined 24.83 ° to the ecliptic . The planetoid is currently 44.07 AU from the Sun. He will next pass through perihelion in 2090, so the last perihelion should have taken place in 1808.

Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), while the Minor Planet Center does not have a specific classification; the latter classifies it as a non-SDO and generally as a “distant object” . The Johnston's Archive, however, lists him as Cubewano , whereby he would belong to the "hot" classic KBO in terms of rail dynamics .

size

A diameter of 457 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.4  m . Assuming a diameter of 457 km, this results in a total surface of around 656,000 km 2 . The apparent magnitude of the 2014 XR 40 is 21.77  m .

Since it can be assumed that the 2014 XR 40 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 believes that it is in 2014 XR 40 to possibly is a dwarf planet.

Provisions of the diameter for 2014 XR 40
year Dimensions km source
2018 404.0 Johnston
2018 457.0 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 523772 . SwRI (Space Science Department). Retrieved March 1, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 1, 2019.
  3. ↑ a b c (523772) 2014 XR40 at the IAU Minor Planet Center (English) Accessed March 1, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O107: 2014 XR40 . IAU . July 17, 2016. Accessed March 1, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 1, 2019.
  7. ↑ (523772) 2014 XR40 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 1, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 1, 2019.
  9. ↑ (523772) 2014 XR40 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 March 1, 2019.