(523639) 2010 RE 64

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Asteroid
(523639) 2010 RE 64
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO or
"Distant Object"
Major semi-axis 65.595  AU
eccentricity 0.444
Perihelion - aphelion 36,443 AU - 94,747 AU
Inclination of the orbit plane 13.5 °
Length of the ascending node 67.3 °
Argument of the periapsis 20.6 °
Time of passage of the perihelion December 15, 2076
Sidereal period 531 a 3.2 M
Mean orbital velocity 3,647 km / s
Physical Properties
Medium diameter approx. 561
Albedo 0.09
Absolute brightness 4.4 - 4.6 mag
history
Explorer Pan-STARRS or
David L. Rabinowitz
Megan E. Schwamb
Suzanne W. Tourtellotte
Date of discovery July 11, 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.

(523639) 2010 RE 64 is a large trans-Neptunian object , which is classified as a scattered disc object in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

(523639) 2010 RE 64 was discovered on July 11, 2010 as part of the Pan-STARRS program at the Haleakalā Observatory ( Maui ). Although the discovery is officially attributed to Pan-STARRS, it was announced by American astronomers David Lincoln Rabinowitz , Meg Schwamb and Suzanne Tourtellotte of the La Silla Observatory ( Chile ) on October 6, 2010. The planetoid received on 25 September 2018 the IAU , the Minor Planet -number five hundred and twenty-three thousand six hundred and thirty-nine .

The asteroid's observation arc begins with the official discovery observation in July 2010. In October 2018, a total of 122 observations were made over a period of 8 years. The last observation so far was carried out in December 2017 on the Pan-STARRS telescope. (As of February 9, 2019)

properties

Orbit

2010 RE 64 orbits the sun in 531.27 years in a strongly elliptical orbit between 36.44  AU and 94.75 AU from its center. The orbit eccentricity is 0.444, the orbit is inclined 13.55 ° to the ecliptic . The planetoid is currently 51.74 AU from the sun. He will next pass perihelion in 2076, so the last perihelion should have occurred around the year 1545.

Marc Buie ( DES ) classified RE 64 as SDO in 2010 , the Minor Planet Center as SDO / Centaur and more generally as a “Distant Object” .

size

A diameter of around 550 to 600 km is currently assumed, based on a reflectivity of 9% and an absolute brightness of 4.4 to 4.6  m ; however, this is fraught with some uncertainties, as the estimates range from 370 to 820 km due to the unknown albedo. The apparent magnitude of 2010 RE 64 is 21.56 m .

Since it can be assumed that 2010 RE 64 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should nevertheless meet the criteria for classification as a dwarf planet . Mike Brown assumes that 2010 RE 64 is likely a dwarf planet.

Provisions of the diameter for 2010 RE 64
year Dimensions km source
2018 584.0 Johnston
2018 561.0 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 523639 . SwRI (Space Science Department). Accessed January 31, 2019.
  2. ↑ a b c (523639) 2010 RE64 at the IAU Minor Planet Center (English) Retrieved on February 22, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2010-T36: 2010 RE64 . IAU . October 6, 2010. Accessed January 31, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved February 22, 2019.
  6. ↑ (523639) 2010 RE64 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 22, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 9, 2019.
  8. ↑ AstDyS: (523639) 2010RE64 . Universita di Pisa. Retrieved October 13, 2019.
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Accessed January 31, 2019.
  10. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed January 31, 2019.