2013 FS 28

from Wikipedia, the free encyclopedia
Asteroid
2013 FS 28
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type ETNO
DO (E SDO ) or
SDO ,
"Distant Object"
Major semi-axis 197,374  AU
eccentricity 0.826
Perihelion - aphelion 34,363 AU - 360,386 AU
Inclination of the orbit plane 13 °
Length of the ascending node 204.7 °
Argument of the periapsis 101.8 °
Time of passage of the perihelion June 20, 2111
Sidereal period 2772 a 11.6 m
Mean orbital velocity 2.103 km / s
Physical Properties
Medium diameter approx. 468 km
Albedo 0.07-0.09
Absolute brightness 4.9 - 5.3 mag
history
Explorer Chadwick A. Trujillo
Scott S. Sheppard
Date of discovery March 16, 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.

2013 FS 28 is a large Trans-Neptunian Object in the Kuiper belt , the web dynamically as "extreme trans Neptunisches Object" (ETNO) and as close or extended Scattered Disc Object is classified (DO or SDO). Because of its size, the asteroid is a dwarf planet candidate . The orbit of the planetoid can only be roughly determined at the moment.

discovery

2013 FS 28 was discovered on March 16, 2013 by Chad Trujillo and Scott Sheppard with the 4.0 m Víctor M. Blanco telescope at the Cerro Tololo Observatory ( Chile ). The discovery was announced on August 29, 2016.

The asteroid's observation sheet begins with the official discovery observation in March 2013. In April 2017, there were only 13 observations over a period of 13 months, which is not yet sufficient for a reliable orbit determination. The last observation so far was carried out in May 2014 at the Las Campanas Observatory (Chile). (As of February 26, 2019)

properties

Orbit

According to current knowledge, 2013 FS 28 orbits the sun in 2772.97 years on a highly elliptical orbit between 34.36  AU and 360.39 AU from its center. The eccentricity of the orbit is 0.826, the orbit is inclined 13.03 ° to the ecliptic . The planetoid is currently 84.25 AU from the Sun. The next time he will pass perihelion in 2111, the last perihelion will probably have taken place in 660 BC.

2013 FS 28 belongs to a small group of detached objects that have perihelia over 30 AU and large semi-axes over 150 AU. Such Extreme Trans-Neptunian Objects (ETNO) can not enter such orbits without an orbital object, which led to speculation about a ninth planet .

The Minor Planet Center is running FS 28 in 2013 as SDO / Centaur and generally as a “Distant Object”, while Marc Buie ( DES ) does not yet have a specific classification. The Johnston's Archive, however, lists the planetoid as an extended SDO (ESDO or DO ).

size

A diameter of around 468 km is currently assumed, based on a reflectivity of 7% and an absolute brightness of 5.3  m . Assuming a diameter of 468 km, this results in a total surface of around 688,000 km². The apparent brightness of 2013 FS 28 is 24.30  m .

Since it can be assumed that 2013 FS 28 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 expects that it is at 2013 FS 28 to possibly is a dwarf planet.

Provisions of the diameter for 2013 FS 28
year Dimensions km source
2018 464.0 Johnston
2018 468.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 26, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 26, 2019.
  3. ↑ a b c 2013 FS28 at the IAU Minor Planet Center (English) Retrieved on February 26, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-Q38: 2013 FS28 . IAU . August 29, 2016. Retrieved February 26, 2019.
  6. ↑ 2013 FS28 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 26, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPC q => 30 AU, a => 150 AU . IAU . Retrieved February 26, 2019.
  8. ^ Marc W. Buie : Orbit Fit and Astrometric record for 13FS28 . SwRI (Space Science Department). Retrieved February 26, 2019.
  9. ↑ 2013 FS28 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 February 26, 2019.