(523688) 2014 DK 143

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Asteroid
(523688) 2014 DK 143
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type RKBO 3: 5 ,
"Distant Object"
Major semi-axis 42,551  AU
eccentricity 0.157
Perihelion - aphelion 35.855 AU - 49.247 AU
Inclination of the orbit plane 10.9 °
Length of the ascending node 153.5 °
Argument of the periapsis 338.5 °
Time of passage of the perihelion February 2, 1951
Sidereal period 277 a 6.8 M
Mean orbital velocity 4.529 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 28, 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.

(523688) 2014 DK 143 is a large trans-Neptunian object in the Kuiper belt , which is classified as a resonant Kuiper belt object (3: 5 resonance) in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 DK 143 was discovered on February 28, 2014 by a team of astronomers in images taken as part of the Pan-STARRS project at the Haleakalā Observatory ( Maui ) on April 28, 2011. The discovery was announced on July 17, 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 523688 .

After its discovery, in 2014 DK 143 could be identified on photos up to February 26, 2010, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by twelve years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, a total of 131 observations were made over a period of 9 years. The last observation so far was carried out again on the Pan-STARRS telescope in May 2018. (As of March 18, 2019)

properties

Orbit

2014 DK 143 orbits the sun in 277.57 years on a slightly elliptical orbit between 35.85  AU and 49.25 AU from its center. The orbit eccentricity is 0.157, the orbit is 10.86 ° inclined to the ecliptic . The planetoid is currently 43.41 AU from the sun. He last passed through perihelion in 1951, so the next perihelion should take place in 2228.

Marc Buie ( DES ) classifies the planetoid as RKBO ( 3: 5 resonance with Neptune ), while the Minor Planet Center does not have a specific classification; the latter lists it as a non-SDO and generally as a “distant object” .

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 brightness of 2014 DK 143 is 22.11  m .

Since it is conceivable that 2014 DK 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 expects that it is at 2,014 DK 143 to perhaps is a dwarf planet.

Determination of the diameter for 2014 DK 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 523688 . 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 (523688) 2014 DK143 at the IAU Minor Planet Center (English) Retrieved on March 18, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-078: 2014 DK143 . IAU . July 17, 2016. Accessed March 18, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 18, 2019. Reference there: MPC 111779
  7. ↑ (523688) 2014 DK143 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. ↑ (523688) 2014 DK143 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.