2014 QY ₄₄₁

Asteroid 2014 QY 441
Properties of the orbit ( animation ) Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type	RKBO 3: 4 , "Distant Object"
Major semi-axis	36.26  AU
eccentricity	0.08
Perihelion - aphelion	33,353 AU - 39,167 AU
Inclination of the orbit plane	10.2 °
Length of the ascending node	79.7 °
Argument of the periapsis	122.6 °
Time of passage of the perihelion	March 29, 2089
Sidereal period	218 a 4.2 M
Mean orbital velocity	4.906 km / s
Physical Properties
Medium diameter	approx. 343 km
Albedo	0.08-0.09
Absolute brightness	5.7 likes
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.

2014 QY ₄₄₁ is a large trans-Neptunian object in the Kuiper belt , which is classified as a resonant Kuiper belt object (3: 4 resonance) in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 QY ₄₄₁ was tested on August 22, 2014 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 16, 2016.

After his discovery, in 2014 QY was ₄₄₁ on photos to 2 November 2005, which at the Kitt Peak Observatory ( Arizona were made), dating back to identify and extend its observation period to nine years in order to calculate its orbit accurately. Since then, the planetoid has been observed through various earth-based telescopes. In September 2018, a total of 149 observations were made over a period of 13 years. The last observation so far was carried out in December 2017 at the Pan-STARRS telescope (PS1). (As of March 22, 2019)

properties

Orbit

2014 QY ₄₄₁ orbits the sun in 218.35 years on a slightly elliptical orbit between 33.35  AU and 39.17 AU from its center. The orbit eccentricity is 0.080, the orbit is 10.19 ° inclined to the ecliptic . The planetoid is currently 37.68 AU from the Sun. It will next pass through perihelion in 2089, so the last perihelion should have occurred in 1870.

Marc Buie ( DES ) classifies the planetoid as RKBO ( 3: 4 resonance with Neptune ), 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” .

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 QY ₄₄₁ is 21.74  ^m .

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

Provisions of the diameter for 2014 QY ₄₄₁

year	Dimensions km	source
2018	321.0	Johnston
2018	343.0	Brown
The most precise determination is marked in bold .

See also

• List of trans-Neptunian objects
• List of dwarf planets of the solar system
• List of asteroids
• List of moons from asteroids

Web links

• How many dwarf planets are there in the outer solar system? Current list of the largest TNOs from Mike Brown
• Free the dwarf planets! Mike Brown's column on the IAU and the dwarf planets regarding their classifications (23 August 2011)

Individual evidence

1. ^ ^{A b} Marc W. Buie : Orbit Fit and Astrometric record for 14QY441 . SwRI (Space Science Department). Retrieved March 22, 2019.
2. ^ List Of Transneptunian Objects. In: Minor Planet Center. Accessed March 26, 2019 . 
3. ↑ ^{a b c} Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 22, 2019.
4. ↑ ^{a b c} 2014 QY441 at the IAU Minor Planet Center (English). Accessed March 22, 2019.
5. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
6. ↑ MPC : MPEC 2016-056: 2014 QY441 . IAU . July 16, 2016. Accessed March 22, 2019.
7. ↑ 2014 QY441 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 22, 2019.
8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 22, 2019.
9. ↑ 2014 QY441 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 22, 2019.