(523690) 2014 DN 143

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Asteroid
(523690) 2014 DN 143
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO ( "Hot" ),
"Distant Object"
Major semi-axis 47.213  AU
eccentricity 0.071
Perihelion - aphelion 43.848 AU - 50.578 AU
Inclination of the orbit plane 6.8 °
Length of the ascending node 303.8 °
Argument of the periapsis 318.6 °
Time of passage of the perihelion November 21, 2087
Sidereal period 324 a 5.0 M
Mean orbital velocity 4.299 km / s
Physical Properties
Medium diameter approx. 447 km
Albedo 0.06-0.09
Absolute brightness 5.3 - 5.5 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 5th January 2012
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.

(523690) 2014 DN 143 is a large trans-Neptunian object in the Kuiper belt , which is classified as Cubewano (CKBO) in terms of railway dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 DN 143 was on January 5, 2012 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 five hundred twenty-three thousand six hundred ninety .

After its discovery, in 2014 DN 143 could be identified on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ) up to February 20, 2001, and so on extend its observation period by 11 years in order to calculate its orbit more precisely. In October 2018, a total of 152 observations were made over a period of 17 years. The last observation so far was again carried out in February 2018 on the Pan-STARRS telescope (PS1). (As of March 4, 2019)

properties

Orbit

2014 DN 143 orbits the sun in 324.42 years in an almost circular orbit between 43.85  AU and 50.58 AU from its center. The orbit eccentricity is 0.071, the orbit is 6.79 ° inclined to the ecliptic . Currently, the planetoid is 46.64 AU from the sun. He will next pass through perihelion in 2087, so the last perihelion should have occurred in 1763.

Marc Buie ( DES ) classifies the asteroid as Cubewano , whereby it belongs to the orbital dynamics “hot” classical KBO , 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” .

size

A diameter of 447 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.5  m . Assuming a diameter of 447 km, this results in a total surface of about 628,000 km 2 . The apparent brightness of 2014 DN 143 is 22.05  m .

Since it can be assumed that in 2014 DN 143 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 DN 143 to possibly is a dwarf planet.

Provisions of the diameter for 2014 DN 143
year Dimensions km source
2018 386.0 Johnston
2018 447.0 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 523690 . SwRI (Space Science Department). Retrieved March 4, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 4, 2019.
  3. ↑ a b c (523690) 2014 DN143 at the IAU Minor Planet Center (English) Retrieved on March 4, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O129: 2014 DN143 . IAU . July 17, 2016. Retrieved March 4, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 4, 2019.
  7. ↑ (523690) 2014 DN143 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 4, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 4, 2019.
  9. ↑ (523690) 2014 DN143 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 4, 2019.