2013 FH 28

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Asteroid
2013 FH 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 43,396  AU
eccentricity 0.145
Perihelion - aphelion 37.111 AU - 49.681 AU
Inclination of the orbit plane 13.1 °
Length of the ascending node 322.9 °
Argument of the periapsis 294.8 °
Time of passage of the perihelion February 17, 2067
Sidereal period 285 a 10.6 M
Mean orbital velocity 4.484 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.9 - 6.5 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.

2013 FH 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 railway dynamics. Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2013 FH 28 was discovered on March 17, 2013 by Scott Sheppard and Chad Trujillo with the 4.0 m Víctor M. Blanco telescope ( DE Cam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on February 13, 2015 after confirmation by the Las Campanas Observatory .

After its discovery, FH 28 could be identified in 2013 on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ) going back to February 20, 2001, thus changing its observation period Extend twelve years to more accurately calculate its orbit. Since then, the planetoid has been observed through various earth-based telescopes. In September 2018, there were a total of 79 observations over a period of 17 years. The last observation so far was carried out in March 2017 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 27, 2019)

properties

Orbit

2013 FH 28 orbits the sun in 285.88 years on a slightly elliptical orbit between 37.11  AU and 49.68 AU from its center. The orbit eccentricity is 0.145, the orbit is inclined 13.10 ° to the ecliptic . The planetoid is currently 41.04 AU from the Sun. He will next pass perihelion in 2067, so the last perihelion should have occurred in 1781.

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 315 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.9  m . Based on this diameter, the total area is about 312,000 km². The apparent magnitude of 2013 FH 28 is 22.35  m .

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

Provisions of the diameter for 2013 FH 28
year Dimensions km source
2018 222.0 Johnston
2018 315.0 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 13FH28 . SwRI (Space Science Department). Retrieved March 27, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 27, 2019.
  3. ↑ a b c 2013 FH28 at the IAU Minor Planet Center (English) Retrieved on March 27, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2015-C63: 2013 FH28 . IAU . February 13, 2015. Accessed March 27, 2019.
  6. ↑ 2013 FH28 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 27, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 27, 2019.
  8. ↑ 2013 FH28 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 March 27, 2019.