2010 RF 64

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Asteroid
2010 RF 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 42,972  AU
eccentricity 0.174
Perihelion - aphelion 35.475 AU - 50.469 AU
Inclination of the orbit plane 28.7 °
Length of the ascending node 130.9 °
Argument of the periapsis 208.9 °
Time of passage of the perihelion October 18, 1998
Sidereal period 281 a 8.4 M
Mean orbital velocity 4.506 km / s
Physical Properties
Medium diameter approx. 457 km
Albedo 0.06-0.09
Absolute brightness 5.4 - 5.7 mag
history
Explorer Megan E. Schwamb
David L. Rabinowitz
Suzanne W. Tourtellotte
Date of discovery September 9, 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.

2010 RF 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 orbit dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2010 RF 64 was discovered on September 9, 2010 by a team of astronomers consisting of Meg Schwamb, Dave Rabinowitz and Suzanne Tourtellotte at the La Silla Observatory ( Chile ) of the European Southern Observatory . The discovery was announced on October 3, 2010 along with 2010 RN 45 .

After its discovery in 2010, RF 64 could be identified in photos taken as part of the Near Earth Asteroid Tracking Program at the Palomar Observatory up to August 20, 2002, thus extending its observation period by eight years calculate its orbit more precisely. In September 2017, a total of 127 observations over a period of 16 years were available. The last observation so far was carried out in December 2017 on the Pan-STARRS telescope. (As of March 2, 2019)

properties

Orbit

2010 RF 64 orbits the sun in 281.70 years in a slightly elliptical orbit between 35.47  AU and 50.47 AU from its center. The orbit eccentricity is 0.174, the orbit is 28.67 ° inclined to the ecliptic . The planetoid is currently 36.56 AU from the Sun. The last time he passed through perihelion was in 1998, so the next perihelion should take place in 2280.

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 km². The apparent magnitude of 2010 RF 64 is 21.29  m .

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

Provisions of the diameter for 2010 RF 64
year Dimensions km source
2018 321.0 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 10RF64 . SwRI (Space Science Department). Retrieved March 2, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 2, 2019.
  3. ↑ a b c 2010 RF64 at the IAU Minor Planet Center (English) Retrieved on March 2, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2010-T12: 2010 RN45, 2010 RF64 . IAU . October 3, 2010. Retrieved March 2, 2019.
  6. ↑ 2010 RF64 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 2, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Accessed March 2, 2019.
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 2, 2019.
  9. ↑ 2010 RF64 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 March 2, 2019.