2014 YA 50

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Asteroid
2014 YA 50
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO or
"Distant Object"
Major semi-axis 46.531  AU
eccentricity 0.174
Perihelion - aphelion 38.453 AU - 54.609 AU
Inclination of the orbit plane 23.8 °
Length of the ascending node 45.5 °
Argument of the periapsis 194.5 °
Time of passage of the perihelion May 28, 2062
Sidereal period 317 a 4.9 M.
Physical Properties
Medium diameter approx. 536 km
Albedo 0.08-0.09
Absolute brightness 4.6 - 4.7 mag
history
Explorer Pan-STARRS
Date of discovery December 25, 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.

2014 YA 50 is a large trans-Neptunian object , which is classified as a detached object or, more generally, as a “distant object” in terms of its path dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 YA 50 was discovered on December 25, 2014 by a team of astronomers using the 1.8 m Pan-STARRS telescope (PS1) at the Haleakalā Observatory ( Maui ). The discovery was announced on July 16, 2016.

After its discovery, in 2014 YA 50 could be identified on photos taken at the Palomar Observatory going back up to March 19, 2002, thus extending its observation period by 12 years in order to calculate its orbit more precisely. In September 2018, a total of 205 observations were made over a period of 16 years. The last observation so far was made in March 2018 at the Purple Mountain Observatory .

properties

Orbit

2014 YA 50 orbits the sun in 317.41 years in an elliptical orbit between 38.45  AU and 54.61 AU from its center. The orbital eccentricity is 0.174, the orbit is 23.85 ° inclined to the ecliptic . The planetoid is currently 42.19 AU from the Sun and 41.50 AU from Earth . He will next pass through perihelion in 2062, so the last perihelion should have occurred in 1745. (As of February 4, 2019)

On the basis of the orbital elements, one calculated first with a Cubewano ; Marc Buie ( DES ), on the other hand, classifies the asteroid as an extended SDO (ESDO or DO ); the Minor Planet Center generally lists it as a “Distant Object” .

size

A diameter of around 536 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 4.7  m . The apparent magnitude of 2014 YA 50 is 20.95  m .

Since it can be assumed that in 2014 YA 50 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown assumes that the 2014 YA 50 is likely a dwarf planet.

Provisions of the diameter for 2014 YA 50
year Dimensions km source
2018 533.0 Johnston
2018 536.0 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 14YA50 . SwRI (Space Science Department). Retrieved February 4, 2019.
  2. ↑ a b c 2014 YA50 at the IAU Minor Planet Center (English)
  3. ↑ MPC : MPEC 2016-065: 2014 YA50 . IAU . July 16, 2016. Retrieved February 4, 2019.
  4. ↑ 2014 YA50 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 4, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  5. ↑ 2014 YA50 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  6. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 4, 2019.
  7. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 4, 2019.