(523730) 2014 OH 394

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Asteroid
(523730) 2014 OH 394
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 46.112  AU
eccentricity 0.166
Perihelion - aphelion 38,452 AU - 53,772 AU
Inclination of the orbit plane 9.7 °
Length of the ascending node 290.2 °
Argument of the periapsis 74.4 °
Time of passage of the perihelion December 13, 2055
Sidereal period 313 a 1.6 M.
Mean orbital velocity 4,350 km / s
Physical Properties
Medium diameter approx. 302 km
Albedo 0.08-0.09
Absolute brightness 6.0 - 6.1 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery July 25, 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.

(523730) 2014 OH 394 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 OH 394 was discovered on July 25, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in images taken as part of the Pan-STARRS project with the 1 , 8-m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on July 19, 2010, discovered. The discovery was announced on July 17, 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number 523 702 .

After its discovery, in 2014 OH 394 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to July 19, 2010 and thus extended its observation period by four years in order to calculate its orbit more precisely. Since then, the planetoid has been observed by the Pan-STARRS telescope and the Lowell observatory . In October 2018, there were a total of 126 observations over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in September 2017. (As of April 6, 2019)

properties

Orbit

2014 OH 394 orbits the sun in 313.13 years on a slightly elliptical orbit between 38.45  AU and 53.77 AU from its center. The eccentricity of the orbit is 0.166, the orbit is inclined 9.67 ° to the ecliptic . The planetoid is currently 39.50 AU from the sun. He will pass perihelion for the last time in 2055, so the next perihelion should have occurred in 1742.

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 302 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 6.0  m . Based on this diameter, the total surface area is around 287,000 km 2 . The apparent magnitude of 2014 OH 394 is 22.43  m .

Since it is conceivable that 2014 OH 394 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 OH 394 to perhaps is a dwarf planet.

Determinations of the diameter for 2014 OH 394
year Dimensions km source
2018 267.0 Johnston
2018 302.0 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 523730 . SwRI (Space Science Department). Retrieved April 6, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved April 6, 2019.
  3. ↑ a b c (523730) 2014 OH394 at the IAU Minor Planet Center (English) Retrieved April 6, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O152: 2014 OH394 . IAU . July 17, 2016. Retrieved April 6, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved April 6, 2019. Reference there: MPC 111779
  7. ↑ (523730) 2014 OH394 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved April 6, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved April 6, 2019.
  9. ↑ (523730) 2014 OH394 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 April 6, 2019.