(523645) 2010 VK 201

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Asteroid
(523645) 2010 VK 201
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO («Hot») or
DO / E SDO
«Distant Object»
Major semi-axis 43,019  AU
eccentricity 0.117
Perihelion - aphelion 37.973 AU - 48.065 AU
Inclination of the orbit plane 28.8 °
Length of the ascending node 156.4 °
Argument of the periapsis 88.9 °
Time of passage of the perihelion July 8, 1885
Sidereal period 282 a 1.9 M.
Mean orbital velocity 4.504 km / s
Physical Properties
Medium diameter approx. 501 km
Albedo 0.07-0.10
Rotation period 7.59 ± 0.05 h (0.316 d )
Absolute brightness 4.4 likes
Spectral class C.
history
Explorer Susan D. Benecchi
Date of discovery November 1, 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.

(523645) 2010 VK 201 is a large trans-Neptunian object that is classified as a Cubewano or an extended Scattered Disc Object in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2010 VK 201 was discovered on November 1, 2010 by Susan D. Benecchi with the 1.8 m Pan-STARRS telescope (PS1) at the Haleakalā Observatory ( Maui ). The discovery was announced on October 17, 2011, the asteroid was given the minor planet number 523645 on September 25, 2018 .

The asteroid's observation sheet begins with the official discovery observation in November 2010. In October 2018, a total of 107 observations over a period of 8 years were available. The last observation so far was made in December 2017 at the Lowell Observatory . (As of February 24, 2019)

properties

Orbit

2010 VK 201 orbits the sun in 282.16 years on a slightly elliptical orbit between 37.97  AU and 48.07 AU from its center. The orbit eccentricity is 0.117, the orbit is 28.84 ° inclined to the ecliptic . The planetoid is currently 48.00 AU from the Sun and 47.89 AU from Earth . He last passed through perihelion in 1885, so the next perihelion should take place in 2167.

Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), while the Minor Planet Center classifies it generally as a “distant object” and as a non-SDO. The Johnston's Archive runs it against it as Cubewano , where it to the ground dynamically "hot" classical KBO would belong.

Size and rotation

A diameter of around 501 km is currently assumed, based on a reflectivity of 7% and an absolute brightness of 5.0  m . The apparent magnitude of 2010 VK 201 is 20.49  m .

Since it can be assumed that 2010 VK 201 is in hydrostatic equilibrium due to its size and therefore must be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown believes that 2010 VK 201 is likely a dwarf planet.

The light curve of the planetoid was analyzed in 2013 by Susan Benecchi and Scott S. Sheppard , based on photometric observations in the S and R bands with Carnegie's 2.5 m Irénée du Pont telescope at the Las Campanas Observatory ( Chile ) . 2010 VK 201 rotates around its axis once every 7 hours and 35.4 minutes. From this it follows that in a 2010 VK 201 year it performs 325880.2 self- rotations (“days”).

It is believed to be a relatively dark carbon-rich body.

Provisions of the diameter for 2010 VK 201
year Dimensions km source
2013 420.27 LightCurve DataBase
2018 443.0 Johnston
2018 501.0 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 523645 . SwRI (Space Science Department). Retrieved February 24, 2019.
  2. ↑ a b c (523645) 2010 VK201 at the IAU Minor Planet Center (English) Retrieved on February 24, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ a b c 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 .
  5. ↑ a b LCDB Data for 2010 VK201 . MinorPlanetInfo. May 2013. Retrieved February 24, 2019.
  6. ↑ MPC : MPEC 2011-U10: 2010 VK201 . IAU . October 17, 2011. Retrieved February 24, 2019.
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved on February 24, 2019, reference there: MPC 111778
  8. ↑ (523645) 2010 VK201 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 24, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 24, 2019.
  10. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 24, 2019.
  11. ↑ (523645) 2010 VK201 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  12. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 24, 2019.