2003 UA 414

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Asteroid
2003 UA 414
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type RKBO 2: 9 or
SDO ,
"Distant Object"
Major semi-axis 82,168  AU
eccentricity 0.556
Perihelion - aphelion 36,451 AU - 127,886 AU
Inclination of the orbit plane 22.4 °
Length of the ascending node 211 °
Argument of the periapsis 101.2 °
Time of passage of the perihelion April 12, 1976
Sidereal period 744 a 10.1 M
Mean orbital velocity 3.259 km / s
Physical Properties
Medium diameter approx. 490 km
Albedo 0.07-0.09
Absolute brightness 5.0 - 5.1 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery October 18, 2003
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.

2003 UA 414 is a large trans-Neptunian object that is classified as a resonant Kuiper belt object (2: 9 resonance) or as a scattered disc object (SDO). Because of its size, the asteroid is a dwarf planet candidate .

discovery

2003 UA 414 was recorded on between 2010 and 2016 by a team of astronomers consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman with the 1.8 m Pan-STARRS telescope (PS1 ) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 15, 2016.

After its discovery, UA 414 could be identified in photos up to October 18, 2003, taken as part of the NEAT program at the Palomar Observatory ( California ), and thus its observation period was extended by 4 years, making its orbit more precise to calculate. In September 2018, there were a total of 174 observations over a period of 15 years. The last observation so far was carried out in February 2018 as part of the Pan-STARRS project. (As of February 23, 2019)

properties

Orbit

2003 UA 414 orbits the sun in 744.84 years in a strongly elliptical orbit between 36.45  AU and 127.89 AU from its center. The orbital eccentricity is 0.556, the orbit is inclined 22.41 ° to the ecliptic . The planetoid is currently 48.24 AU from the Sun. He passed through perihelion for the last time in 1976, so the next perihelion should take place in 2721.

Marc Buie ( DES ) classifies the planetoid as RKBO ( 2: 9 resonance with Neptune ), while the Minor Planet Center lists it as SDO / Centaur and generally as a "Distant Object" .

size

At present, a diameter of about 490 km is assumed, based on a reflectivity of 7% and an absolute brightness of 5.1  m . The apparent magnitude of 2003 UA 414 is 22.07  m .

Since it can be assumed that 2003 UA 414 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2003 UA 414 to possibly is a dwarf planet.

Provisions of the diameter for 2003 UA 414
year Dimensions km source
2018 443.0 Johnston
2018 490.0 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 03UA414 . SwRI (Space Science Department). Retrieved February 23, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 23, 2019.
  3. ↑ a b c 2003 UA414 at the IAU Minor Planet Center (English). Accessed February 23, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-N110: 2003 UA414 . IAU . July 15, 2016. Retrieved February 23, 2019.
  6. ↑ 2003 UA414 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 23, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ 2003 UA414 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 23, 2019.
  9. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 23, 2019.