2014 CO ₂₃

Asteroid 2014 CO 23
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	43.901  AU
eccentricity	0.172
Perihelion - aphelion	36.345 AU - 51.457 AU
Inclination of the orbit plane	7.9 °
Length of the ascending node	20.4 °
Argument of the periapsis	49.8 °
Time of passage of the perihelion	June 17, 1945
Sidereal period	290 a 10.6 M
Mean orbital velocity	4.458 km / s
Physical Properties
Medium diameter	approx. 447 km
Albedo	0.06-0.09
Absolute brightness	5.3 - 5.5 mag
history
Explorer	Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman
Date of discovery	February 9, 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 CO ₂₃ 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 railway dynamics. Because of its size, the asteroid is a dwarf planet candidate .

discovery

2013 HV ₁₅₆ was tested on February 9, 2014 by a team of astronomers 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, CO _{23 could be identified} on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory up to December 14, 2002, and thus its observation period at 12 Extend years to more accurately calculate its orbit. In September 2018, there were a total of 232 observations over a period of 16 years. The last observation so far was again carried out in April 2018 at the Pan-STARRS telescope. (As of March 6, 2019)

properties

Orbit

2014 CO ₂₃ orbits the sun in 290.88 years on a slightly elliptical orbit between 36.34  AU and 51.46 AU from its center. The orbital eccentricity is 0.172, the orbit is 7.93 ° inclined to the ecliptic . Currently, the planetoid is 45.33 AU from the sun. He passed through perihelion for the last time in 1945, so the next perihelion should take place in 2236.

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 447 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.5  ^m . Assuming a diameter of 447 km, this results in a total surface of about 628,000 km ² . The apparent magnitude of 2014 CO ₂₃ is 21.97  ^m .

Since it can be assumed that 2014 CO ₂₃ is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for being classified as a dwarf planet . Mike Brown assumes that 2014 CO ₂₃ may be a dwarf planet.

Provisions of the diameter for 2014 CO ₂₃

year	Dimensions km	source
2018	386.0	Johnston
2018	447.0	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 14CO23 . SwRI (Space Science Department). Retrieved March 6, 2019.
2. ↑ ^{a b c} Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 6, 2019.
3. ↑ ^{a b c} 2014 CO23 at the IAU Minor Planet Center (English) Retrieved March 6, 2019.
4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
5. ↑ MPC : MPEC 2016-O75: 2014 CO23 . IAU . July 17, 2016. Accessed March 6, 2019.
6. ↑ 2014 CO23 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 6, 2019.
7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 6, 2019.
8. ↑ 2014 CO23 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 6, 2019.