(505624) 2014 GU 53

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Asteroid
(505624) 2014 GU 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 43.864  AU
eccentricity 0.176
Perihelion - aphelion 36,147 AU - 51,581 AU
Inclination of the orbit plane 23.5 °
Length of the ascending node 178.5 °
Argument of the periapsis 116 °
Time of passage of the perihelion February 4, 2049
Sidereal period 290 a 6.2 m
Mean orbital velocity 4,460 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.6 - 5.9 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery April 8, 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.

(505624) 2014 GU 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 railway dynamics. Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2014 GU 53 was discovered on April 8, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in pictures taken as part of the Pan-STARRS project with the 1 , 8 m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on August 18, 2010, discovered. The discovery was announced on July 16, 2016, the planetoid was later given the minor planet number 505624 by the IAU .

After its discovery, in 2014 GU 53 could be identified on photos, which were also taken as part of the Pan-STARRS, going back to April 24, 2012 and thus extended its observation period by two years in order to calculate its orbit more precisely. Since then, the planetoid has been observed through various earth-based telescopes. In November 2017, there were a total of 126 observations over a period of 6 years. The last observation so far was made in April 2018 at the Apache Point Observatory ( New Mexico ). (As of March 26, 2019)

properties

Orbit

2014 GU 53 orbits the sun in 290.52 years on a slightly elliptical orbit between 36.14  AU and 51.58 AU from its center. The orbital eccentricity is 0.176, the orbit is 23.49 ° inclined to the ecliptic . Currently, the planetoid is 38.32 AU from the sun. He will next pass through perihelion in 2049, so the last perihelion should have occurred in 1758.

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 brightness of 2014 GU 53 is 21.83  m .

Since it is conceivable that 2014 GU 53 is in hydrostatic equilibrium due to its size and could therefore be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2014 GU 53 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 GU 53
year Dimensions km source
2018 336.0 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 505624 . 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 (505624) 2014 GU53 at the IAU Minor Planet Center (English) Retrieved March 26, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-046: 2014 GU53 . IAU . July 16, 2016. Retrieved March 26, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 26, 2019.
  7. ↑ (505624) 2014 GU53 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. ↑ (505624) 2014 GU53 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.