2010 concentration camp 39

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Asteroid
2010 concentration camp 39
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO or
RKBO 6:11 or
Cubewano («Heiss»),
«Distant Object»
Major semi-axis 45,556  AU
eccentricity 0.055
Perihelion - aphelion 43.053 AU - 48.06 AU
Inclination of the orbit plane 26 °
Length of the ascending node 53.1 °
Argument of the periapsis 309.9 °
Time of passage of the perihelion May 28, 2062
Sidereal period 307 a 5.9 M
Mean orbital velocity 4.42 km / s
Physical Properties
Medium diameter approx. 574 km
Albedo 0.09
Absolute brightness 4.03 ± 0.01 mag
history
Explorer Andrzej Udalski
Scott S. Sheppard
Michał K. Szymański
Chadwick A. Trujillo
Date of discovery May 21, 2010
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.

2010 KZ 39 is a large trans-Neptunian object , which is classified as either detached object , resonant KBO ( 6:11 resonance), cubewano and more generally as a "distant object" . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2010 KZ 39 was discovered on May 21, 2010 by a Polish-American team of astronomers consisting of Andrzej Udalski , Scott Sheppard , Michał Krzysztof Szymański and Chad Trujillo with the 1.3 m telescope of the University of Warsaw at the Las Campanas Observatory ( Chile ) discovered. The discovery was announced on June 8, 2010.

The asteroid's observation sheet begins with the official discovery observation in May 2010. In April 2017, there were only 28 observations over a period of just under two years. The last observation so far was carried out in March 2012 - also at the Las Campanas Observatory. (As of February 5, 2019)

properties

Orbit

2010 KZ 39 orbits the sun in 307.49 years on a slightly elliptical orbit between 43.05  AU and 48.06 AU from its center. The orbit eccentricity is 0.055, the orbit is 26.03 ° inclined to the ecliptic . The planetoid is currently 46.01 AU from the Sun and 46.52 AU from Earth . The next time it passes through perihelion in 2102, the last perihelion should have been in 1794.

The Minor Planet Center listed it as a Cubewano and now generally as a “Distant Object” , whereas Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ); It is possible that the planetoid is in a 6:11 resonance with Neptune, but this requires further observation, as the orbital parameters known so far are still too uncertain.

size

A diameter of around 574 km is currently assumed, based on a reflectivity of 9% and an absolute brightness of 4.5  m . Since the reflectivity could not yet be determined, sizes from 420 to 940 km would also be possible, assuming albedo values ​​between 0.25 and 0.05. The apparent brightness of 2010 KZ 39 is 20.75  m .

Since it can be assumed that 2010 concentration camp 39 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 assumes that 2010 concentration camp 39 is probably a dwarf planet.

Determination of the diameter for 2010 KZ 39
year Dimensions km source
2005 666.04 LightCurve DataBase
2018 702.0 Johnston
2018 574.0 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 10KZ39 . SwRI (Space Science Department). Retrieved February 5, 2019.
  2. ↑ a b c S. Benecchi, Scott S. Sheppard : Light Curves of 32 Large Transneptunian Objects (PDF) . In: The Astronomical Journal . 145, No. 5, January 24, 2013, p. 124, 19. arxiv : 1301.5791 . bibcode : 2013AJ .... 145..124B . doi : 10.1088 / 0004-6256 / 145/5/124 .
  3. ↑ a b c 2010 KZ39 at the IAU Minor Planet Center (English)
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2010-L38: 2010 KZ39 . IAU . June 8, 2010. Retrieved February 5, 2019.
  6. ↑ 2010 KZ39 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 5, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ^ Conversion of Absolute Magnitude to Diameter for Minor Planets , calculator from Stephen F. Austin State University
  8. ↑ 2010 KZ39 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 5, 2019.
  10. ↑ LCDB Data for 2010 KZ39 . MinorPlanetInfo. May 2013. Retrieved February 5, 2019.
  11. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 5, 2019.