(523696) 2014 GW 53

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Asteroid
(523696) 2014 GW 53
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 41.503  AU
eccentricity 0.087
Perihelion - aphelion 37.907 AU - 45.098 AU
Inclination of the orbit plane 21.9 °
Length of the ascending node 54.9 °
Argument of the periapsis 236.5 °
Time of passage of the perihelion January 3, 2066
Sidereal period 267 a 4.6 M
Mean orbital velocity 4.586 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.9 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery April 4, 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.

(523696) 2014 GW 53 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 orbital dynamics. Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2014 GW 53 was tested on April 4, 2014 by a team of astronomers 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 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number 523696 .

After its discovery, GW 53 could be identified in 2014 on photos, which were also taken as part of the Pan-STARRS, going back to February 2, 2011, thus extending its observation period by three years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, there were a total of 192 observations over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in May 2018. (As of March 26, 2019)

properties

Orbit

2014 GU 53 orbits the sun in 267.38 years on a slightly elliptical orbit between 37.90  AU and 45.10 AU from its center. The orbit eccentricity is 0.087, the orbit is inclined 21.87 ° with respect to the ecliptic . The planetoid is currently 40.13 AU from the sun. He will next pass through perihelion in 2066, so the last perihelion should have taken place in 1798.

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 surface area is around 312,000 km 2 . The apparent magnitude of 2014 GW 53 is 21.75  m .

Since it is conceivable that 2014 GW 53 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 expects that it is at 2,014 GW 53 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 GW 53
year Dimensions km source
2018 352.0 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 523696 . SwRI (Space Science Department). Retrieved March 26, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 26, 2019.
  3. ↑ a b c (523696) 2014 GW53 at the IAU Minor Planet Center (English) Retrieved March 26, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-0131: 2014 GW53 . IAU . July 17, 2016. Accessed March 26, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 26, 2019. Reference there: MPC 111778
  7. ↑ (523696) 2014 GW53 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 26, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 26, 2019.
  9. ↑ (523696) 2014 GW53 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 26, 2019.