2014 OD 394

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Asteroid
2014 OD 394
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO ( "Hot" ),
"Distant Object"
Major semi-axis 44,341  AU
eccentricity 0.097
Perihelion - aphelion 40,034 AU - 48,648 AU
Inclination of the orbit plane 11.2 °
Length of the ascending node 130.1 °
Argument of the periapsis 84.1 °
Time of passage of the perihelion September 21, 1892
Sidereal period 295 a 3.2 M
Mean orbital velocity 4,436 km / s
Physical Properties
Medium diameter approx. 358 km
Albedo 0.08-0.09
Absolute brightness 5.7 likes
history
Explorer Pan-STARRS
Date of discovery July 31, 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 OD 394 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Cubewano (CKBO) in terms of railway dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 OD 394 was discovered on July 31, 2014 by a team of astronomers as part of the Pan-STARRS project with the 1.8 m Ritchey Chretien telescope (PS1) at the Haleakalā Observatory ( Maui ). The discovery was made on January 2, 2019 by a Pan-STARRS team of astronomers consisting of J. Bulger, K. Chambers, B. Gibson, T. Goggia, T. Lowe, E. Magnier, N. Primak, A. Schultz, J. Thiel, S. Watters, and M. Willman.

After its discovery, OD 394 could be identified in photos up to October 16, 2011, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by three years in order to calculate its orbit more precisely. Since then, the planetoid has been observed through various earth-based telescopes. In January 2019, a total of 99 observations were available over a period of 7 years. The last observation so far was carried out again at the Pan-STARRS telescope (PS1) in November 2017. (As of March 18, 2019)

properties

Orbit

2014 OD 394 orbits the sun in 295.27 years on a slightly elliptical orbit between 40.03  AU and 48.65 AU from its center. The orbital eccentricity is 0.097, the orbit is 11.24 ° inclined to the ecliptic . Currently, the planetoid is 48.29 AU from the sun. He last passed through perihelion in 1892, so the next perihelion is likely to take place in 2188.

Marc Buie ( DES ) classifies the asteroid as Cubewano , whereby it belongs to the orbital dynamics “hot” classical KBO , while the Minor Planet Center does not have a specific classification; the latter lists it as a non-SDO and generally as a "distant object" .

size

A diameter of 358 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total area is about 403,000 km².

Since it is conceivable that 2014 OD 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 believes that it is in 2014 OD 394 to perhaps is a dwarf planet.

Determinations of the diameter for 2014 OD 394
year Dimensions km source
2018 386.0 Johnston
2018 358.0 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 14OD394 . SwRI (Space Science Department). Retrieved March 18, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 18, 2019.
  3. ↑ a b c 2014 OD394 at the IAU Minor Planet Center (English) Retrieved March 18, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2019-A08: 2014 OD394 . IAU . January 2, 2019. Retrieved March 18, 2019.
  6. ↑ 2014 OD394 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 18, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 18, 2019.
  8. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 18, 2019.