(437915) 2002 GD 32

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Asteroid
(437915) 2002 GD 32
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
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.

Provisions of the diameter for 2002 GD 32
year Dimensions km source
2018 293.0 Johnston
2018 391.0 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 437915 . SwRI (Space Science Department). Retrieved March 9, 2019.
  2. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 9, 2019.
  3. ↑ a b c (437915) 2002 GD32 at the IAU Minor Planet Center (English) Retrieved March 9, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2003-J12: 2002 GD32 . IAU . May 1, 2003. Retrieved March 9, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 9, 2019. Reference there: MPC 58201 (PDF)
  7. ↑ (437915) 2002 GD32 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 9, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 9, 2019.
  9. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 9, 2019.
  10. ↑ (437915) 2002 GD32 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  11. ↑ a b c Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 9, 2019.