2014 OJ 394

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Asteroid
2014 OJ 394
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO or
SDO ),
"Distant Object"
Major semi-axis 53.053  AU
eccentricity 0.229
Perihelion - aphelion 40.921 AU - 65.185 AU
Inclination of the orbit plane 34.7 °
Length of the ascending node 299.3 °
Argument of the periapsis 272.2 °
Time of passage of the perihelion July 25, 1959
Sidereal period 386 a 5.2 M
Mean orbital velocity 4.056 km / s
Physical Properties
Medium diameter approx. 457 km
Albedo 0.06-0.09
Absolute brightness 5.2 - 5.4 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery July 26, 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 OJ 394 is a large trans-Neptunian object that is classified as a near or extended scattered disk object (SDO or DO) in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 OJ 394 was discovered on July 26, 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, OJ 394 could be identified in photos up to July 4, 2013, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by one year in order to calculate its orbit more precisely. In September 2018, a total of 93 observations were made over a period of 5 years. The last observation so far was carried out again at the Pan-STARRS telescope in May 2018. (As of March 2, 2019)

properties

Orbit

2014 OJ 394 orbits the sun in 386.43 years on a strongly elliptical orbit between 40.92  AU and 65.19 AU from its center. The orbit eccentricity is 0.229, the orbit is inclined 34.65 ° with respect to the ecliptic . The planetoid is currently 48.45 AU from the sun. He last passed through perihelion in 1959, so the next perihelion should take place in 2345.

Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), while the Minor Planet Center classifies it as an SDO ; the latter also generally lists it as a "distant object" .

size

A diameter of 457 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.4  m . Assuming a diameter of 457 km, this results in a total surface of around 656,000 km 2 . The apparent magnitude of 2014 OJ 394 is 22.28  m .

Since it can be assumed that 2014 OJ 394 is in hydrostatic equilibrium due to its size and therefore must be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2014 OJ 394 to possibly is a dwarf planet.

Provisions of the diameter for 2014 OJ 394
year Dimensions km source
2018 423.0 Johnston
2018 457.0 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 14OJ394 . SwRI (Space Science Department). Retrieved March 2, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 2, 2019.
  3. ↑ a b c 2014 OJ394 at the IAU Minor Planet Center (English). Accessed March 2, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O153: 2014 OJ394 . IAU . July 17, 2016. Retrieved March 2, 2019.
  6. ↑ 2014 OJ394 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 2, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ 2014 OJ394 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  8. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 2, 2019.
  9. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 2, 2019.