2013 AT 183

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Asteroid
2013 AT 183
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 61.611  AU
eccentricity 0.422
Perihelion - aphelion 35.63 AU - 87.592 AU
Inclination of the orbit plane 28.1 °
Length of the ascending node 304.6 °
Argument of the periapsis 68.3 °
Time of passage of the perihelion October 12, 1926
Sidereal period 463 a 7.3 M
Mean orbital velocity 3.764 km / s
Physical Properties
Medium diameter approx. 501 km
Albedo 0.07-0.09
Absolute brightness 4.6 - 5.0 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery January 10, 2013
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.

2013 AT 183 is a large Trans-Neptunian Object , the web dynamically as scattered disc object is classified. Because of its size, the asteroid is a dwarf planet candidate .

discovery

2013 AT 183 was determined by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, on images of the 1.8 m Pan-STARRS telescope (PS1) taken on Made January 10, 2013, discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 26, 2016.

After its discovery, in 2013 AT 183 could be subsequently identified on photos up to January 29, 2003, which were taken at the Apache Point Observatory and were found in the archive of the Sloan Digital Sky Survey , thus extending its observation period by two years to include his Calculate orbit more accurately. In April 2017, there were a total of 25 observations over a period of 12 years. The last observation so far was carried out in February 2014 also on the Pan-STARRS telescope. (As of February 18, 2019)

properties

Orbit

2013 AT 183 orbits the sun in 483.61 years in an elliptical orbit between 35.63  AU and 87.59 AU from its center. The orbital eccentricity is 0.422, the orbit is 28.12 ° inclined to the ecliptic . The planetoid is currently 62.91 AU from the Sun. He passed through perihelion for the last time in 1926, so the next perihelion should take place in 2410.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also generally lists it as a "distant object" .

size

A diameter of around 501 km is currently assumed, based on a reflectivity of 7% and an absolute brightness of 5.0  m . The apparent magnitude of 2015 BZ 518 is 22.81  m .

Since it can be assumed that 2013 AT 183 is in hydrostatic equilibrium due to its size and therefore has to be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown assumes that 2013 AT 183 is likely a dwarf planet.

Provisions of the diameter for 2013 AT 183
year Dimensions km source
2018 533.0 Johnston
2018 501.0 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 13AT183 . SwRI (Space Science Department). Retrieved February 18, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 18, 2019.
  3. ↑ a b c 2013 AT183 at the IAU Minor Planet Center (English) Retrieved on February 18, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O376: 2013 AT183 . IAU . July 26, 2016. Retrieved February 18, 2019.
  6. ↑ 2013 AT183 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 18, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ 2013 AT183 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  8. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 18, 2019.
  9. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 18, 2019.