(437915) 2002 GD 32
Asteroid (437915) 2002 GD 32 |
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Properties of the orbit ( animation ) | |
Orbit type |
RKBO 5: 9 , "Distant Object" |
Major semi-axis | 44.73 AU |
eccentricity | 0.131 |
Perihelion - aphelion | 38.883 AU - 50.578 AU |
Inclination of the orbit plane | 6.6 ° |
Length of the ascending node | 22.2 ° |
Argument of the periapsis | 23.9 ° |
Time of passage of the perihelion | August 5, 1870 |
Sidereal period | 299 a 1.9 M. |
Mean orbital velocity | 4.417 km / s |
Physical Properties | |
Medium diameter | approx. 391 km |
Albedo | 0.04-0.09 |
Absolute brightness | 5.9 - 6.1 mag |
history | |
Explorer | Marc W. Buie |
Date of discovery | April 7, 2002 |
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. |
(437915) 2002 GD 32 is a large trans-Neptunian object in the Kuiper belt , which is classified as a resonant Kuiper belt object (5: 9 resonance) in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
2002 GD 32 was discovered on April 7, 2002 by Marc Buie with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on May 1, 2003, the planetoid was later given the minor planet number 437915 by the IAU .
The observation sheet of the asteroid begins with the official observation on April 7, 2002. In April 2017, a total of 30 observations over a period of 13 years were available. The last observation so far was made in May 2014 at the Kitt Peak Observatory ( Arizona ). (As of March 10, 2019)
properties
Orbit
2002 GD 32 orbits the sun in 299.16 years in an almost circular orbit between 38.88 AU and 50.58 AU from its center. The orbit eccentricity is 0.131, the orbit is 6.58 ° inclined to the ecliptic . The planetoid is currently 50.58 AU from the sun. He last passed through perihelion in 1870, so the next perihelion is likely to take place in 2169.
Marc Buie ( DES ) classifies the planetoid as RKBO ( 5: 9 resonance with Neptune ), while the Minor Planet Center does not have a specific classification, it classifies it as a non-SDO and generally as a “distant object”.
size
A diameter of 391 km is currently assumed, based on a reflectivity of 4% and an absolute brightness of 6.1 m . Assuming a diameter of 391 km, this results in a total surface of around 480,000 km². The apparent magnitude of 2002 GD 32 is 23.25 m .
Since it is conceivable that 2002 GD 32 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 2002 DG 32 to perhaps is a dwarf planet.
2002 GD 32 seems to have a bluish (neutral) color, which is why the albedo is assumed to be comparatively low.
year | Dimensions km | source |
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2018 | 293.0 | Johnston |
2018 | 391.0 | 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 Marc W. Buie : Orbit Fit and Astrometric record for 437915 . SwRI (Space Science Department). Retrieved March 9, 2019.
- ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 9, 2019.
- ↑ a b c (437915) 2002 GD32 at the IAU Minor Planet Center (English) Retrieved March 9, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2003-J12: 2002 GD32 . IAU . May 1, 2003. Retrieved March 9, 2019.
- ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 9, 2019. Reference there: MPC 58201 (PDF)
- ↑ (437915) 2002 GD32 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 9, 2019.
- ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 9, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 9, 2019.
- ↑ (437915) 2002 GD32 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- ↑ a b c Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 9, 2019.