(523687) 2014 DF 143

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Asteroid
(523687) 2014 DF 143
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 42.829  AU
eccentricity 0.046
Perihelion - aphelion 40.876 AU - 44.783 AU
Inclination of the orbit plane 23.7 °
Length of the ascending node 35.6 °
Argument of the periapsis 73.5 °
Time of passage of the perihelion August 23, 1947
Sidereal period 280 a 3.6 M
Mean orbital velocity 4.514 km / s
Physical Properties
Medium diameter approx. 358 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.7 mag
history
Explorer Pan-STARRS
Date of discovery February 26, 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.

(523687) 2014 DF 143 is a large trans-Neptunian object in the Kuiper belt , which is classified as an extended Scattered Disk Object (DO) or as a Cubewano (CKBO) in terms of orbital dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 DF 143 was discovered on February 26, 2014 by a team of astronomers in images taken as part of the Pan-STARRS project at the Haleakalā Observatory ( Maui ) on April 12, 2011. The discovery was announced on July 16, 2016 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman (Pan-STARRS), the planetoid received on September 25, 2018 from the IAU the minor planet number 523687 .

After its discovery, DF 143 could be identified in photos up to March 12, 2002, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), and thus its observation period was changed Extend twelve years to more accurately calculate its orbit. Since then, the planetoid has been observed through various earth-based telescopes. In October 2018, there were a total of 166 observations over a period of 17 years. The last observation so far was made in June 2018 at the Cerro Tololo Observatory ( Chile ). (As of March 18, 2019)

properties

Orbit

2014 DF 143 orbits the sun in 280.30 years in an almost circular orbit between 40.87  AU and 44.78 AU from its center. The orbital eccentricity is 0.046, the orbit is 23.68 ° inclined to the ecliptic . The planetoid is currently 42.99 AU from the sun. He last passed through perihelion in 1947, so the next perihelion should take place in 2227.

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 358 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total surface area is around 403,000 km 2 . The apparent magnitude of the 2014 DF 143 is 21.98  m .

Since it is conceivable that 2014 DF 143 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 believes that it is in 2014 DF 143 to perhaps is a dwarf planet.

Determination of the diameter for 2014 DF 143
year Dimensions km source
2018 352.0 Johnston
2018 358.0 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 523687 . SwRI (Space Science Department). Retrieved March 18, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 18, 2019.
  3. ↑ a b c (523687) 2014 DF143 at IAU Minor Planet Center (English) Retrieved March 18, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O42: 2014 DF143 . IAU . July 16, 2016. Retrieved March 18, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 18, 2019. Reference there: MPC 111779
  7. ↑ (523687) 2014 DF143 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 18, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 18, 2019.
  9. ↑ (523687) 2014 DF143 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 18, 2019.