(470316) 2007 OC 10

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Asteroid
(470316) 2007 OC 10
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO or
DO (E SDO ),
"Distant Object"
Major semi-axis 49.984  AU
eccentricity 0.291
Perihelion - aphelion 35.46 AU - 64.508 AU
Inclination of the orbit plane 21.7 °
Length of the ascending node 258 °
Argument of the periapsis 52.4 °
Time of passage of the perihelion July 30, 2007
Sidereal period 353 a 4.7 M
Mean orbital velocity 4.178 km / s
Physical Properties
Medium diameter
Albedo
Absolute brightness 5.43 ± 0.10 mag
Spectral class C
B-R = 1.430
history
Explorer Megan E. Schwamb,
Michael E. Brown
Date of discovery July 22, 2007
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.

(470316) 2007 OC 10 is a large trans-Neptunian object that is classified as a near or extended scattered disk object (SDO or DO) in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2007 OC 10 was discovered on July 22, 2007 by Meg Schwamb and Mike Brown of the California Institute of Technology (CalTech) with the 1.2 m Oschin Schmidt telescope at the Palomar Observatory ( California ). The discovery was announced on September 6, 2007, it was confirmed in 2008 by the 1.5 m Cassegrain telescope also at the Palomar observatory; the planetoid was later given the minor planet number 470316 by the IAU .

The observation arc of the asteroid begins with the official observation on July 22, 2007. Since then, the asteroid has been observed through various telescopes such as the Herschel space telescope and earth-based telescopes. In April 2017, a total of 159 observations were made over a period of 8 years. The last observation so far was carried out in July 2015 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 13, 2019)

properties

Orbit

2007 OC 10 orbits the sun in 353.39 years in an elliptical orbit between 35.46  AU and 64.51 AU from its center. The orbit eccentricity is 0.291, the orbit is inclined 21.65 ° to the ecliptic . The planetoid is currently 36.07 AU from the Sun. The last time he passed through perihelion was in 2007, so the next perihelion should take place in 2360.

Marc Buie ( DES ) classifies the planetoid as SDO , while the Minor Planet Center does not have a specific classification; the latter classifies it as a non-SDO and generally as a “distant object” . The team of the “TNOs are cool” program, however, classifies it as an extended SDO (ESDO or DO ). The Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of 309 km is currently assumed, based on a reflectivity of 12.7% and an absolute brightness of 5.43  m , which was determined by the Herschel space telescope. Based on this diameter, the total surface area is almost exactly 300,000 km 2 . The apparent magnitude of 2007 OC 10 is 20.96  m .

Since it is conceivable that 2007 OC 10 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 expects that it is at 2007 OC 10 to perhaps is a dwarf planet.

Determination of the diameter for 2007 OC 10
year Dimensions km source
2008 309.0 ± 37.0 Santos-Sanz et al. a.
2012 306.0 +93.0−72.0 Lellouch u. a.
2018 315.0 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 470316 . SwRI (Space Science Department). Retrieved March 28, 2019.
  2. ↑ a b c E. Lellouch u. a .: "TNOs are Cool": A survey of the trans-Neptunian region. IX. Thermal properties of Kuiper belt objects and Centaurs from combined Herschel and Spitzer observations (PDF) . In: Astronomy and Astrophysics . 557, No. A60, June 10, 2013, p. 19. bibcode : 2013A & A ... 557A..60L . doi : 10.1051 / 0004-6361 / 201322047 .
  3. ↑ a b c (470316) 2007 OC10 at the IAU Minor Planet Center (English) Retrieved on March 28, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ a b c d P. Santos-Sanz u. a .: TNOs are Cool: A survey of the trans-Neptunian region. IV. Size / albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS (PDF) . In: Astronomy and Astrophysics . 541, No. A92, May 4, 2012, p. 18. arxiv : 1202.1481 . bibcode : 2012A & A ... 541A..92S . doi : 10.1051 / 0004-6361 / 201118541 .
  6. ↑ MPC : MPEC 2007-R27: 2007 OC10 . IAU . September 6, 2007. Accessed March 28, 2019.
  7. ↑ MPC : MPEC 2008-J66: 2007 OC10 . IAU . May 12, 2008. Retrieved March 28, 2019.
  8. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 28, 2019.
  9. ↑ (470316) 2007 OC10 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 28, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  10. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 28, 2019.
  11. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 28, 2019.
  12. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 28, 2019.
  13. ↑ (470316) 2007 OC10 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  14. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 28, 2019.