(483002) 2014 QS 441

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Asteroid
(483002) 2014 QS 441
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 46.842  AU
eccentricity 0.08
Perihelion - aphelion 43,112 AU - 50,571 AU
Inclination of the orbit plane 37.9 °
Length of the ascending node 185.9 °
Argument of the periapsis 268.3 °
Time of passage of the perihelion March 31, 2062
Sidereal period 320 a 7.1 M
Mean orbital velocity 4,316 km / s
Physical Properties
Medium diameter approx. 343 km
Albedo 0.08-0.09
Absolute brightness 5.4 - 5.7 mag
history
Explorer Dark Energy Survey
Date of discovery 19th August 2014
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.

(483002) 2014 QS 441 is a large trans-Neptunian object in the Kuiper Belt , which is classified as an extended Scattered Disk Object (DO) or as a Cubewano (CKBO) in terms of rail dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 QS 441 was discovered on August 19, 2014 by a team of astronomers as part of the Dark Energy Survey project with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The planetoid was later given the minor planet number 483002 by the IAU .

After its discovery, in 2014 QS 441 could be identified on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ) up to September 19, 1998, thus reversing its observation period Extend 16 years to more accurately calculate its orbit. Since then, the planetoid has been observed through various earth-based telescopes. In December 2017, a total of 94 observations over a period of 19 years were available. The last observation so far was again carried out in September 2016 at the Cerro Tololo Observatory. (As of March 19, 2019)

properties

Orbit

2014 QS 441 orbits the sun in 320.59 years on a slightly elliptical orbit between 43.11  AU and 50.57 AU from its center. The orbit eccentricity is 0.080, the orbit is 37.91 ° inclined to the ecliptic . The planetoid is currently 44.54 AU from the sun. He will next pass through perihelion in 2062, so the last perihelion should have occurred in 1741.

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 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 magnitude of 2014 QS 441 is 22.16  m .

Since it is conceivable that, due to its size, QS 441 will be in hydrostatic equilibrium in 2014 and thus largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2014 QS 441 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 QS 441
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 483002 . SwRI (Space Science Department). Retrieved March 19, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 19, 2019.
  3. ↑ a b c (483002) 2014 QS441 at the IAU Minor Planet Center (English) Retrieved on March 19, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 19, 2019.
  6. ↑ (483002) 2014 QS441 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 19, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 19, 2019.
  8. ↑ (483002) 2014 QS441 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 19, 2019.