2014 EA 52

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Asteroid
2014 EA 52
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 41,603  AU
eccentricity 0.102
Perihelion - aphelion 37.352 AU - 45.854 AU
Inclination of the orbit plane 19 °
Length of the ascending node 140.7 °
Argument of the periapsis 89.7 °
Time of passage of the perihelion September 9, 2032
Sidereal period 268 a 4.1 M
Mean orbital velocity 4.580 km / s
Physical Properties
Medium diameter approx. 343 km
Albedo 0.08-0.09
Absolute brightness 5.4 - 5.7 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery March 9, 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 EA 52 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 may be one of the dwarf planet candidates .

discovery

2014 EA 52 was used on March 9, 2014 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, as part of the Pan-STARRS project with the 1.8-m –Ritchey-Chretien – Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016.

After its discovery, EA 52 could be identified in photos up to March 23, 2002, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), and thus changed 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 174 observations over a period of 16 years. The last observation so far was again carried out in March 2018 at the Pan-STARRS telescope (PS1). (As of March 20, 2019)

properties

Orbit

2014 EA 52 orbits the sun in 268.34 years on a slightly elliptical orbit between 37.35  AU and 45.85 AU from its center. The orbital eccentricity is 0.102, the orbit is 18.99 ° inclined to the ecliptic . The planetoid is currently 37.61 AU from the Sun. He will next pass through perihelion in 2032, so the last perihelion should have occurred in 1764.

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 343 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total surface area is around 370,000 km 2 . The apparent magnitude of the 2014 EA 52 is 21.32  m .

Since it is conceivable that 2014 EA 52 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 2014 EA 52 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 EA 52
year Dimensions km source
2018 368.0 Johnston
2018 343.0 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 14EA52 . SwRI (Space Science Department). Retrieved March 20, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 20, 2019.
  3. ↑ a b c 2014 EA52 at the IAU Minor Planet Center (English) Retrieved on March 20, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O130: 2014 EA52 . IAU . July 17, 2016. Retrieved March 20, 2019.
  6. ↑ 2014 EA52 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 20, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 20, 2019.
  8. ↑ 2014 EA52 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 20, 2019.