(482824) 2013 XC 26

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Asteroid
(482824) 2013 XC 26
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO / Centaur or
"Distant Object"
Major semi-axis 42.232  AU
eccentricity 0.228
Perihelion - aphelion 32.595 AU - 51.869 AU
Inclination of the orbit plane 18.7 °
Length of the ascending node 43.4 °
Argument of the periapsis 148 °
Time of passage of the perihelion March 14, 2055
Sidereal period 274 a 5.4 M
Physical Properties
Medium diameter approx. 524
Albedo 0.08-0.09
Absolute brightness 4.4 - 4.8 mag
history
Explorer Pan-STARRS
Date of discovery December 6, 2013
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.

(482824) 2013 XC 26 is a large trans-Neptunian object whose classification is still unclear; by the Deep Ecliptic Survey , the asteroid is classified as a Scattered Disc Object or Centaur . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2013 XC 26 was discovered on December 6, 2013 as part of the Pan-STARRS program at the Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016. The IAU gave the planetoid the minor planet number 482824 .

After its discovery, in 2013 XC 26 could be identified in photos from January 28, 2012 and thus its observation period was extended by almost two years, so its orbit could be calculated more precisely. In April 2017, a total of 152 observations were made over a period of 5 years.

properties

Orbit

2013 XC 26 orbits the sun in 274.45 years in a strongly elliptical orbit between 32.59  AU and 51.87 AU from its center. The orbital eccentricity is 0.228, the orbit is 18.65 ° inclined to the ecliptic . The planetoid is currently 37.19 AU from the sun and 36.28 from the earth (as of February 1, 2019). He will next pass through perihelion in 2055, so the last perihelion should have occurred around the year 1780.

Marc Buie ( DES ) classifies him as SDO or Centaur. the Minor Planet Center as a "Distant Object" . The Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of around 500 to 600 km is currently assumed, based on a reflectivity of 9 to 10% and an absolute brightness of 4.4 to 4.8  m ; however, this is fraught with some uncertainties. The 2013 XC 26's apparent magnitude is 20.36  m .

Since it can be assumed that the 2013 XC 26 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should nevertheless meet the criteria for classification as a dwarf planet . Mike Brown believes that the 2013 XC 26 is likely a dwarf planet.

Provisions of the diameter for 2013 XC 26
year Dimensions km source
2018 584.0 Johnston
2018 524.0 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 482824 . SwRI (Space Science Department). Accessed January 31, 2019.
  2. ↑ a b c (482824) 2013 XC26 at the IAU Minor Planet Center (English)
  3. ↑ MPC : MPEC 2016-O122: 2013 XC26 . IAU . July 17, 2016. Accessed January 31, 2019.
  4. ↑ (482824) 2013 XC26 in the Small-Body Database of the Jet Propulsion Laboratory (English). Accessed January 30, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  5. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed January 31, 2019.
  6. ↑ (482824) 2013 XC26 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  7. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Accessed January 31, 2019.