(523773) 2014 XS 40

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Asteroid
(523773) 2014 XS 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 42,299  AU
eccentricity 0.163
Perihelion - aphelion 35.39 AU - 49.209 AU
Inclination of the orbit plane 27.5 °
Length of the ascending node 186.6 °
Argument of the periapsis 262 °
Time of passage of the perihelion September 22, 1993
Sidereal period 275 a 1.3 M.
Mean orbital velocity 4.542 km / s
Physical Properties
Medium diameter approx. 447 km
Albedo 0.06-0.09
Absolute brightness 5.4 - 5.5 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery December 7, 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.

(523773) 2014 XS 40 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 orbit dynamics. Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 XS 40 was tested on December 7, 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 five hundred twenty-three thousand six hundred ninety .

After its discovery, in 2014 XS 40 could be identified on photos up to November 15, 2010, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by four years in order to calculate its orbit more precisely. In October 2018, a total of 155 observations were made over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in January 2018. (As of March 4, 2019)

properties

Orbit

2014 XS 40 orbits the sun in 275.11 years on a slightly elliptical orbit between 35.39  AU and 49.21 AU from its center. The orbit eccentricity is 0.163, the orbit is 27.55 ° inclined to the ecliptic . Currently, the planetoid is 45.13 AU from the sun. He passed through perihelion for the last time in 1993, so the next perihelion should take place in 2268.

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 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 XS 40 is 21.16  m .

Since it can be assumed that 2014 XS 40 is in hydrostatic equilibrium due to its size and therefore has to be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2014 XS 40 to possibly is a dwarf planet.

Provisions of the diameter for 2014 XS 40
year Dimensions km source
2018 368.0 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 523773 . 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 (523773) 2014 XS40 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-O170: 2014 XS40 . IAU . July 17, 2016. Retrieved March 4, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 4, 2019.
  7. ↑ (523773) 2014 XS40 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. ↑ (523773) 2014 XS40 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.