(523735) 2014 QX 441

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Asteroid
(523735) 2014 QX 441
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO ),
"Distant Object"
Major semi-axis 38,471  AU
eccentricity 0.041
Perihelion - aphelion 36.905 AU - 40.038 AU
Inclination of the orbit plane 26 °
Length of the ascending node 43.8 °
Argument of the periapsis 294.1 °
Time of passage of the perihelion August 30, 1998
Sidereal period 238 a 7.4 M
Mean orbital velocity 4.763 km / s
Physical Properties
Medium diameter approx. 343 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.7 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 22nd 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.

(523735) 2014 QX 441 is a large trans-Neptunian object in the Kuiper Belt , which is classified as an extended Scattered Disk Object (DO) in terms of orbit dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 QX 441 was discovered on August 22nd, 2014 by a team of astronomers consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in pictures taken as part of the Pan-STARRS project with the 1st , 8 m Ritchey Chretien telescope (PS1) at Haleakalā Observatory ( Maui ) on September 12, 2010, discovered. The discovery was announced on 16 July 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number five hundred twenty-three thousand seven hundred and thirty-five .

After its discovery in 2014, QX 441 could be identified on photos up to September 12, 2010, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by four years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, a total of 129 observations were made over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in January 2018. (As of March 20, 2019)

properties

Orbit

2014 QX 441 orbits the sun in 238.62 years in an almost circular orbit between 36.90  AU and 40.04 AU from its center. The orbit eccentricity is 0.041, the orbit is inclined 26.03 ° to the ecliptic . The planetoid is currently 37.15 AU from the Sun. The last time he went through perihelion was in 1998, so the next perihelion should take place in 2237.

Marc Buie ( DES ) classifies the planetoid as an extended scattered disc object (DO), where he ground dynamically to the "hot" classical KBO heard during the Minor Planet Center is no specific classification; the latter classifies it as a non-SDO and generally as a “distant object” . The Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

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 the 2014 QX 441 is 21.42  m .

Since it is conceivable that 2014 QX 441 will be 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 believes that it is in 2014 QX 441 to perhaps is a dwarf planet.

Determinations of the diameter for 2014 QX 441
year Dimensions km source
2018 352.0 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 523735 . SwRI (Space Science Department). Retrieved March 20, 2019.
  2. ↑ a b c (523735) 2014 QX441 at the IAU Minor Planet Center (English) Retrieved March 20, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2016-O55: 2014 QX441 . IAU . July 16, 2016. Retrieved March 20, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 20, 2019. Reference there: MPC 111779
  6. ↑ (523735) 2014 QX441 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. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 20, 2019.
  9. ↑ (523735) 2014 QX441 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 20, 2019.