(501546) 2014 YY 80

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Asteroid
(501546) 2014 YY 80
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 43,182  AU
eccentricity 0.275
Perihelion - aphelion 31,297 AU - 55,066 AU
Inclination of the orbit plane 18.7 °
Length of the ascending node 261.4 °
Argument of the periapsis 97.7 °
Time of passage of the perihelion April 4, 2033
Sidereal period 283 a 9.1 M.
Mean orbital velocity 4.495 km / s
Physical Properties
Medium diameter approx. 329 km
Albedo 0.08-0.10
Absolute brightness 5.5 - 5.8 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery May 7, 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.

(501546) 2014 JJ 80 is a large trans-Neptunian object in the Kuiper Belt , which is classified as a Scattered Disk Object (SDO) for orbit dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 JJ 80 was discovered on May 7, 2014 by an astronomical team , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in images taken as part of the Pan-STARRS project with the 1 , 8 m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on July 9, 2013, discovered. The discovery was announced on July 17, 2016 the asteroid was on October 5, 2017 the IAU , the Minor Planet -number five hundred and one thousand five hundred forty-six .

After its discovery, in 2014 JJ 80 could be identified on photos, which were also taken as part of the Pan-STARRS, going back to August 19, 2010, thus extending its observation period by four years in order to calculate its orbit more precisely. Since then, the planetoid has been observed through various earth-based telescopes. In July 2018, there were a total of 160 observations over a period of 8 years. The last observation so far was carried out in July 2018 at the Purple Mountain Observatory ( People's Republic of China ). (As of March 24, 2019)

properties

Orbit

2014 JJ 80 orbits the sun in 283.76 years on a strongly elliptical orbit between 31.29  AU and 55.07 AU from its center. The orbit eccentricity is 0.275, the orbit is 18.67 ° inclined to the ecliptic . The planetoid is currently 32.35 AU from the Sun. He will next pass through perihelion in 2033, so the last perihelion should have occurred in 1749.

Marc Buie ( DES ) classifies the planetoid as SDO or as Centaur , 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 lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of 329 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.8  m . Based on this diameter, the total surface area is around 340,000 km 2 .

Since it is conceivable that 2014 JJ 80 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 expects that it is at 2014 JJ 80 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 YY 80
year Dimensions km source
2018 352.0 Johnston
2018 329.0 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 501546 . SwRI (Space Science Department). Retrieved March 24, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 24, 2019.
  3. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 24, 2019.
  4. ↑ a b c (501546) 2014 JJ80 at the IAU Minor Planet Center (English) Accessed March 24, 2019.
  5. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  6. ↑ MPC : MPEC 2016-084: 2014 JJ80 . IAU . July 17, 2016. Accessed March 24, 2019.
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 24, 2019. Reference there: MPC 106396
  8. ↑ (501546) 2014 JJ80 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 24, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 24, 2019.