2014 DM ₁₄₃

Asteroid 2014 DM 143
Properties of the orbit ( animation ) Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type	CKBO ( "Hot" ) "Distant Object"
Major semi-axis	45,022  AU
eccentricity	0.09
Perihelion - aphelion	40.986 AU - 49.057 AU
Inclination of the orbit plane	10.7 °
Length of the ascending node	67.5 °
Argument of the periapsis	267.4 °
Time of passage of the perihelion	September 1, 2129
Sidereal period	302 a 1.1 M.
Mean orbital velocity	4.403 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	February 26, 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 DM ₁₄₃ is a large trans-Neptunian object in the Kuiper belt , which is classified as Cubewano (CKBO) in terms of railway dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 DM ₁₄₃ was awarded on February 26, 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 17, 2016.

After its discovery, in 2014 DM _{143 could be identified} on photos up to March 12, 2002, which were taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ), thus reversing its observation period Extend twelve years to more accurately calculate its orbit. Since then the planetoid has only been observed through the Pan-STARRS telescope. In December 2018, a total of 121 observations were made over a period of 16 years. The last observation so far was carried out in April 2017 on the Pan-STARRS telescope (PS1). (As of March 20, 2019)

properties

Orbit

2014 DM ₁₄₃ orbits the sun in 302.09 years on a slightly elliptical orbit between 40.99  AU and 49.06 AU from its center. The orbital eccentricity is 0.090, the orbit is 10.73 ° inclined to the ecliptic . Currently, the planetoid is 47.89 AU from the sun. The next time it passes through perihelion in 2129, the last perihelion is likely to have occurred in 1827.

Marc Buie ( DES ) classifies the asteroid as Cubewano , whereby it belongs to the orbital dynamics “hot” classical KBO , 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 brightness of 2014 DM ₁₄₃ is 22.49  ^m .

Since it is conceivable that 2014 DM ₁₄₃ is in hydrostatic equilibrium due to its size and thus could be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2,014 DM ₁₄₃ to perhaps is a dwarf planet.

Determination of the diameter for 2014 DM ₁₄₃

year	Dimensions km	source
2018	368.0	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 14DM143 . 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} 2014 DM143 at the IAU Minor Planet Center (English) Retrieved on March 20, 2019.
4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
5. ↑ MPC : MPEC 2016-O128: 2014 DM143 . IAU . July 17, 2016. Retrieved March 20, 2019.
6. ↑ 2014 DM143 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 20, 2019.
7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 20, 2019.
8. ↑ 2014 DM143 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.