(523671) 2013 FZ 27

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Asteroid
(523671) 2013 FZ 27
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO or
"Distant Object"
Major semi-axis 48,143  AU
eccentricity 0.22
Perihelion - aphelion 37.574 AU - 58.713 AU
Inclination of the orbit plane 14.1 °
Length of the ascending node 285.2 °
Argument of the periapsis 341.9 °
Time of passage of the perihelion December 31, 2090
Sidereal period 334 a 0.6 M.
Mean orbital velocity 4.258 km / s
Physical Properties
Medium diameter approx. 561 km
Albedo 0.09
Absolute brightness 4.4 - 4.6 mag
history
Explorer Pan-STARRS or
Scott S. Sheppard
Chadwick A. Trujillo
Date of discovery December 15, 2010
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.

(523671) 2013 FZ 27 is a large trans-Neptunian object , which is classified as a scattered disc object in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2013 FZ 27 was discovered on December 15, 2010 as part of the Pan-STARRS program at the Haleakalā Observatory ( Maui ). Although the discovery is officially attributed to Pan-STARRS, it was announced by American astronomers Scott Sheppard and Chadwick A. Trujillo of the Cerro Tololo Observatory ( Chile ) on April 2, 2014. The planetoid received the minor planet number 523671 from the IAU on September 25, 2018 .

The Sednoid 2012 VP 113 and the SDO 2013 FY27 27 were during the same screening as 2013 FY 27 discovered and 2013 weeks were announced for week from 26 March.

After its discovery, 2013 FZ 27 could be identified on photos from December 20, 2001, which were taken at the Apache Point Observatory as part of the Sloan Digital Sky Survey , and thus its observation period was extended by nine years in order to more precisely determine its orbit to calculate. In October 2018, a total of 171 observations were made over a period of 18 years. The last observation to date was again carried out in March 2018 as part of the Pan-STARRS project. (As of February 22, 2019)

properties

Orbit

2013 FZ 27 orbits the sun in 334.05 years on a strongly elliptical orbit between 37.57  AU and 58.71 AU from its center. The orbit eccentricity is 0.220, the orbit is inclined 14.06 ° with respect to the ecliptic . Currently, the planetoid is 48.16 AU from the sun. He will next pass through perihelion in 2090, so the last perihelion should have occurred around the year 1756.

Marc Buie ( DES ) classifies it as an SDO , 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 550 to 600 km is currently assumed, based on a reflectivity of 9% and an absolute brightness of 4.4 to 4.6  m ; this is, however, fraught with some uncertainties, since the estimates range from 320 to 640 km due to the unknown albedo. The apparent brightness of 2013 FZ 27 is 21.31  m .

Since it can be assumed that 2013 FZ 27 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 assumes that 2013 FZ 27 is probably a dwarf planet.

Determination of the diameter for 2013 FZ 27
year Dimensions km source
2018 584.0 Johnston
2018 561.0 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 523671 . SwRI (Space Science Department). Retrieved February 22, 2019.
  2. ↑ a b c (523671) 2013 FZ27 at the IAU Minor Planet Center (English) Retrieved on February 22, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2014-G07: 2013 FZ27 . IAU . April 2, 2014. Retrieved February 22, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved February 22, 2019.
  6. ↑ (523671) 2013 FZ27 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 22, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 22, 2019.
  8. ↑ (523671) 2013 FZ27 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 22, 2019.