(523640) 2010 RO 64

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Asteroid
(523640) 2010 RO 64
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 46,803  AU
eccentricity 0.121
Perihelion - aphelion 41,152 AU - 52,454 AU
Inclination of the orbit plane 17.1 °
Length of the ascending node 60.8 °
Argument of the periapsis 311.5 °
Time of passage of the perihelion 30th of June 2013
Sidereal period 320 a 2.3 M
Mean orbital velocity 4,318 km / s
Physical Properties
Medium diameter approx. 457 km
Albedo 0.06-0.10
Absolute brightness 4.84 ± 0.02 - 5.4 mag
Spectral class C.
history
Explorer Pan-STARRS
Date of discovery 4th August 2010
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.

(523640) 2010 RO 64 is a large trans-Neptunian object in the Kuiper belt , which is classified as an extended Scattered Disc Object (DO) or Cubewano in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2010 RO 64 was discovered on August 4, 2010 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 announced on 13 October 2010 (27 October 2011 revised), the asteroid was on 25 September 2018 the IAU , the minor planet number five hundred and twenty-three thousand six hundred and forty .

After its discovery, RO 64 could be identified in photos up to September 7, 2004, which were taken as part of the near-earth asteroid tracking program at the Palomar observatory , and thus its observation period was extended by six years calculate its orbit more precisely. In September 2017, there were a total of 208 observations over a period of 15 years. The last observation so far was again carried out in November 2017 at the Pan-STARRS telescope. (As of March 1, 2019)

properties

Orbit

2010 RO 64 orbits the sun in 320.19 years on a slightly elliptical orbit between 41.15  AU and 52.45 AU from its center. The orbit eccentricity is 0.120, the orbit is 17.08 ° inclined to the ecliptic . The planetoid is currently 41.20 AU from the sun. He last passed through perihelion in 2013, so the next perihelion should take place in 2333.

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 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 2010 RO 64 is 21.62  m .

Since it can be assumed that 2010 RO 64 is in hydrostatic equilibrium due to its size and therefore has to be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2010 RO 64 to possibly is a dwarf planet.

Provisions of the diameter for 2010 RO 64
year Dimensions km source
2018 366.02 LightCurve DataBase
2018 404.0 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 523640 . SwRI (Space Science Department). Retrieved March 1, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 1, 2019.
  3. ↑ a b c (523640) 2010 RO64 at the IAU Minor Planet Center (English) Retrieved on March 1, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ S. Benecchi et al. a .: Lightcurves of 32 Large Transneptunian Objects (PDF) . In: The Astronomical Journal . 145, No. 5, 2013/01/24, p. 124, 19. arxiv : 1301.5791 . bibcode : 2013AJ .... 145..124B . doi : 10.1088 / 0004-6256 / 145/5/124 .
  6. ↑ a b LCDB Data for (523640) 2010RO64 . MinorPlanetInfo. September 2018. Accessed March 1, 2019.
  7. ↑ MPC : MPEC 2010-T92: 2010 RO64 . IAU . October 13, 2010. Accessed March 1, 2019.
  8. ↑ MPC : MPEC 2011-U86: 2010 RO64 . IAU . October 27, 2011. Accessed March 1, 2019.
  9. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 1, 2019.
  10. ↑ (523640) 2010 RO64 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 1, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  11. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Accessed March 1, 2019.
  12. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 1, 2019.
  13. ↑ (523640) 2010 RO64 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  14. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 1, 2019.