2013 JW 63

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Asteroid
2013 JW 63
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type "Other TNO" ,
"Distant Object"
Major semi-axis 46.416  AU
eccentricity 0.178
Perihelion - aphelion 38,174 AU - 54,658 AU
Inclination of the orbit plane 7.8 °
Length of the ascending node 309.2 °
Argument of the periapsis 19.2 °
Time of passage of the perihelion June 13, 2073
Sidereal period 316 a 2.9 M.
Mean orbital velocity 4,336 km / s
Physical Properties
Medium diameter approx. 373 km
Albedo 0.08-0.09
Absolute brightness 5.2 - 5.6 mag
history
Explorer Scott S. Sheppard
Chadwick A. Trujillo
Date of discovery May 8, 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 JW 63 is a large trans-Neptunian object in the Kuiper Belt , whose orbit classification is unclear. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2013 JW 63 was discovered on May 8, 2013 by Scott Sheppard and Chad Trujillo with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on May 8, 2014.

The observation sheet of the planetoid begins with the official observation on May 8, 2013. In April 2017, a total of 8 observations were made over a period of almost a year. The last observation so far was carried out in May 2014 at the Las Campanas Observatory ( Chile ). (As of March 14, 2019)

properties

Orbit

2013 JW 63 orbits the sun in 316.24 years on a slightly elliptical orbit between 38.17  AU and 54.66 AU from its center. The orbital eccentricity is 0.178, the orbit is 7.75 ° inclined to the ecliptic . The planetoid is currently 43.80 AU from the sun. He will next pass through perihelion in 2073, so the last perihelion should have occurred in 1757.

Neither Marc Buie ( DES ) nor the Minor Planet Center has a specific classification; the latter only lists it as a non-SDO and generally as a “distant object” . The Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of 373 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.6  m . Based on this diameter, the total area is around 437,000 km². The apparent magnitude of 2013 JW 63 is 21.82  m .

Since it is conceivable that 2013 JW 63 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 believes that it is in 2013 JW 63 to perhaps is a dwarf planet.

Determinations of the diameter for 2013 JW 63
year Dimensions km source
2018 404.0 Johnston
2018 373.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 14, 2019.
  2. ↑ a b c 2013 JW63 at the IAU Minor Planet Center (English) Retrieved on March 14, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2014-J76: 2013 JW63 . IAU . May 8, 2014. Accessed March 14, 2019.
  5. ↑ 2013 JW63 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 14, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  6. ^ Marc W. Buie : Orbit Fit and Astrometric record for 13JW63 . SwRI (Space Science Department). Retrieved March 14, 2019.
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 14, 2019.
  8. ↑ 2013 JW63 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 14, 2019.