(471921) 2013 FC 28

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Asteroid
(471921) 2013 FC 28
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 46.001  AU
eccentricity 0.083
Perihelion - aphelion 42.188 AU - 49.814 AU
Inclination of the orbit plane 16.3 °
Length of the ascending node 193.2 °
Argument of the periapsis 97.4 °
Time of passage of the perihelion November 20, 2108
Sidereal period 312 a 0.0 M
Mean orbital velocity 4.356 km / s
Physical Properties
Medium diameter approx. 373 km
Albedo 0.08-0.09
Absolute brightness 5.2 - 5.6 mag
history
Explorer Scott S. Sheppard
Chadwick A. Trujillo
Date of discovery 17th March 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.

(471921) 2013 FC 28 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. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2013 FC 28 was discovered on March 17, 2013 by Scott Sheppard and Chad Trujillo on with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on May 17, 2014, the planetoid was later given the minor planet number 471921 by the IAU .

After its discovery, 2013 FC 28 could be identified on photos up to March 21, 1999, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), thus reversing its observation period extend twenty days to calculate its orbit more accurately. Since then, the planetoid has been observed through various earth-based telescopes. In April 2017, there were a total of 48 observations over a period of 17 years. The last observation so far was carried out in March 2015 at the Pan-STARRS telescope ( Maui ). (As of March 12, 2019)

properties

Orbit

2013 FC 28 orbits the sun in 312.00 years on a slightly elliptical orbit between 42.19  AU and 49.81 AU from its center. The orbital eccentricity is 0.083, the orbit is 16.28 ° inclined to the ecliptic . The planetoid is currently 42.40 AU from the sun. The next time it passes through perihelion in 2108, the last perihelion is likely to have taken place in 1796.

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 and rotation

A diameter of 373 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.6  m . Assuming a diameter of 373 km, this results in a total surface of around 437,000 km 2 . The apparent magnitude of 2013 FC 28 is 22.15  m .

Since it is conceivable that 2013 FC 28 is in hydrostatic equilibrium due to its size and could thus be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2013 FC 28 to perhaps is a dwarf planet.

Provisions of the diameter for 2013 FC 28
year Dimensions km source
2018 404.0 Johnston
2018 373.0 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 471921 . SwRI (Space Science Department). Retrieved March 12, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 12, 2019.
  3. ↑ a b c (471921) 2013 FC28 at the IAU Minor Planet Center (English) Accessed March 12, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2014-K07: 2013 FC28 . IAU . May 17, 2014. Retrieved March 11, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 12, 2019.
  7. ↑ (471921) 2013 FC28 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 12, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 12, 2019.
  9. ↑ (471921) 2013 FC28 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 12, 2019.