(471150) 2010 FC 49

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Asteroid
(471150) 2010 FC 49
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO ),
"Distant Object"
Major semi-axis 39,079  AU
eccentricity 0.054
Perihelion - aphelion 36.985 AU - 41.172 AU
Inclination of the orbit plane 39.7 °
Length of the ascending node 1.8 °
Argument of the periapsis 296.9 °
Time of passage of the perihelion January 28, 2087
Sidereal period 244 a 3.6 M
Mean orbital velocity 4.726 km / s
Physical Properties
Medium diameter approx. 302 km
Albedo 0.08-0.09
Absolute brightness 5.7 - 6.0 mag
history
Explorer David L. Rabinowitz
Suzanne W. Tourtellotte
Date of discovery March 18, 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.

(471150) 2010 FC 49 is a large trans-Neptunian object in the Kuiper Belt , which is classified as an extended Scattered Disk Object (DO) in terms of orbit dynamics . Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2010 FC 49 was discovered on March 18, 2010 by Dave Rabinowitz and Suzanne Tourtellotte with the 3.6 m ESO telescope at the La Silla Observatory ( Chile ) of the European Southern Observatory (ESO). The discovery was announced on April 12, 2010 together with 2010 ER 65 , 2010 ES 65 , 2010 FB 49 , 2010 FD 49 and 2010 FE 49 , the planetoid was later given the minor planet number 471150 by the IAU .

After its discovery, in 2010 FC 49 could be identified on photos taken as part of the Sloan Digital Sky Survey (SDSS) program at Apache Point Observatory ( New Mexico ) going back to December 11, 2002, thus changing its observation period eight years to more accurately calculate its orbit. Since then, the planetoid has been observed through various earth-based telescopes. In April 2017, a total of 119 observations over a period of 13 years were available. The last observation so far was carried out in May 2015 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 31, 2019)

properties

Orbit

2010 FC 49 orbits the sun in 244.30 years on a slightly elliptical orbit between 36.98  AU and 41.17 AU from its center. The orbit eccentricity is 0.053, the orbit is 39.73 ° inclined to the ecliptic . The planetoid is currently 39.55 AU from the sun. He will next pass perihelion in 2087, so the last perihelion should have occurred in 1842.

Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), 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 Johnston's Archive lists it as "other TNO" , which means that it is definitely not a Cubewano or Resonantes KBO .

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 2010 FC 49 is 21.78  m .

Since it is conceivable that 2010 FC 49 is in hydrostatic equilibrium due to its size and could therefore be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2010 FC 49 to perhaps is a dwarf planet.

Provisions of diameter for 2010 FC 49
year Dimensions km source
2018 321.0 Johnston
2018 302.0 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 471150 . SwRI (Space Science Department). Accessed March 31, 2019.
  2. ↑ a b c (471150) 2010 FC49 at the IAU Minor Planet Center (English). Accessed March 31, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2010-G97: 2010 ER65, 2010 ES65, 2010 FB49, 2010 FC49, 2010 FD49, 2010 FE49 . IAU . April 12, 2010. Accessed March 31, 2019.
  5. ↑ MPC : MPEC 2011-G73: 2010 FC49 . IAU . April 12, 2011. Accessed March 31, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Accessed March 31, 2019.
  7. ↑ (471150) 2010 FC49 in the Small-Body Database of the Jet Propulsion Laboratory (English). Accessed March 31, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Accessed March 31, 2019.
  9. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 31, 2019.
  10. ↑ (471150) 2010 FC49 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  11. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Accessed March 31, 2019.