(530055) 2010 VW 224

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Asteroid
2010 VW 224
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO or
CKBO ( «Hot» ),
«Distant Object»
Major semi-axis 43,593  AU
eccentricity 0.143
Perihelion - aphelion 37.36 AU - 49.825 AU
Inclination of the orbit plane 8.9 °
Length of the ascending node 102.4 °
Argument of the periapsis 148.2 °
Time of passage of the perihelion March 13, 2158
Sidereal period 287 a 9.8 M
Mean orbital velocity 4.474 km / s
Physical Properties
Medium diameter approx. 343 km
Albedo 0.08-0.09
Absolute brightness 5.4 - 5.7 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery November 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 VW 224 is a large trans-Neptunian object in the Kuiper belt , which is classified as a Scattered Disk Object (SDO) or a Cubewano (CKBO) in terms of rail dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2010 VW 224 was developed on November 9, 2010 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, as part of the Pan-STARRS project with the 1.8 m –Ritchey-Chretien – Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 26, 2016.

After its discovery, VW 224 could be identified on photos up to January 31, 2006, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), and thus changed its observation period Extend four years to more accurately calculate its orbit. Since then, the planetoid has been observed through various earth-based telescopes. In November 2017, a total of 28 observations over a period of 8 years were available. The last observation to date was again carried out in November 2013 on the Pan-STARRS telescope (PS1). (As of March 20, 2019)

properties

Orbit

2010 VW 224 orbits the sun in 287.82 years on a slightly elliptical orbit between 37.36  AU and 49.79 AU from its center. The orbital eccentricity is 0.143, the orbit is 8.91 ° inclined to the ecliptic . The planetoid is currently 40.75 AU from the sun. The next time it passes through perihelion in 2158, the last perihelion should have been in 1870.

Marc Buie ( DES ) classifies the planetoid as SDO , 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 343 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total surface area is around 370,000 km 2 . The apparent brightness of 2010 VW 224 is 22.70  m .

Since it is conceivable that 2010 VW 224 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 expects that it is at 2010 VW 224 to perhaps is a dwarf planet.

Provisions of the diameter for 2010 VW 224
year Dimensions km source
2018 368.0 Johnston
2018 343.0 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 10VW224 . SwRI (Space Science Department). Retrieved March 20, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 20, 2019.
  3. ↑ a b c (530055) 2010 VW224 at the IAU Minor Planet Center (English) Retrieved March 20, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O327: 2010 VW224 . IAU . July 26, 2016. Retrieved March 20, 2019.
  6. ↑ (530055) 2010 VW224 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 20, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 20, 2019.
  8. ↑ (530055) 2010 VW224 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 20, 2019.