(143707) 2003 UY 117
Asteroid (143707) 2003 UY 117 |
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Properties of the orbit ( animation ) | |
Orbit type |
RKBO 2: 5 SDO , "Distant Object" |
Major semi-axis | 55.245 AU |
eccentricity | 0.413 |
Perihelion - aphelion | 32,427 AU - 78,063 AU |
Inclination of the orbit plane | 7.6 ° |
Length of the ascending node | 265.1 ° |
Argument of the periapsis | 112 ° |
Time of passage of the perihelion | July 7, 2004 |
Sidereal period | 410 a 7.6 M |
Mean orbital velocity | 3.974 km / s |
Physical Properties | |
Medium diameter | approx. 302 km |
Albedo | 0.08-0.09 |
Absolute brightness | 5.7 - 5.9 mag |
history | |
Explorer | Arianna E. Gleason Jeffrey A. Larsen Robert S. McMillan |
Date of discovery | October 22, 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. |
(143707) 2003 UY 117 is a large trans-Neptunian object that is classified as a resonant Kuiper belt object (2: 5 resonance) or as a scattered disk object (SDO). Due to its size, the asteroid is one of the dwarf planet candidates .
discovery
2003 UY 117 was discovered on October 22, 2003 by a team of astronomers consisting of Arianna Gleason, Jeffrey Larsen and Robert McMillan , using the 0.9 m reflecting telescope at the Steward Observatory of the Kitt Peak Observatory ( Arizona ). The discovery was announced on November 2, 2003 together with the TNO 2003 UZ 117 and the Centaur 2003 UA 118 , the planetoid was later given the minor planet number 143707 by the IAU .
After its discovery in 2003, UY 117 could be identified on photos taken as part of the Near Earth Asteroid Tracking Program (NEAT) at the Palomar Observatory going back to July 26, 2001, thus extending its observation period by two years in order to calculate its orbit more precisely. Since then, the planetoid has been observed through various earth-based telescopes. In November 2017, a total of 155 observations were made over a period of 17 years. The last observation so far was made in September 2018 at the Apache Point Observatory ( New Mexico ). (As of March 30, 2019)
properties
Orbit
2003 UY 117 orbits the sun in 410.63 years in a strongly elliptical orbit between 32.43 AU and 78.06 AU from its center. The orbit eccentricity is 0.413, the orbit is 7.56 ° inclined to the ecliptic . The planetoid is currently 34.03 AU from the Sun. The last time he went through perihelion was in 2004, the next perihelion should therefore take place in 2415.
Marc Buie ( DES ) classifies the planetoid as RKBO ( 2: 5 resonance with Neptune ), while the Minor Planet Center also classified it as RKBO 2: 5 in 2010 and now classifies it as SDO ; the latter also generally classifies it as a distant object .
size
A diameter of 302 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 6.0 m . Based on this diameter, the total surface area is around 287,000 km 2 . The apparent magnitude of 2003 UY 117 is 21.47 m .
Since it is conceivable that 2003 UY 117 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 believes that it is in 2003 UY 117 to perhaps is a dwarf planet.
year | Dimensions km | source |
---|---|---|
2018 | 321.0 | Johnston |
2018 | 302.0 | 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
- ^ A b c Marc W. Buie : Orbit Fit and Astrometric record for 143707 . SwRI (Space Science Department). Retrieved March 30, 2019.
- ↑ a b MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Accessed March 30, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 30, 2019.
- ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 30, 2019.
- ↑ a b c (143707) 2003 UY117 at the IAU Minor Planet Center (English) Accessed March 30, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2003-V03: 2003 UY117, 2003 UZ117, 2003 UA118 . IAU . November 2, 2003. Retrieved March 30, 2019.
- ↑ MPC : MPEC 2003-Y50: 2003 UY117 . IAU . December 23, 2003. Retrieved March 30, 2019.
- ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 30, 2019.
- ↑ (143707) 2003 UY117 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 30, 2019.
- ↑ (143707) 2003 UY117 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 30, 2019.