(524435) 2002 CY 248

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Asteroid
2002 CY 248
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO ( "hot" ),
"Distant Object"
Major semi-axis 46.107  AU
eccentricity 0.15
Perihelion - aphelion 39,198 AU - 53,016 AU
Inclination of the orbit plane 7.1 °
Length of the ascending node 300.8 °
Argument of the periapsis 337.7 °
Time of passage of the perihelion February 14, 2129
Sidereal period 313 a 1.0 M.
Mean orbital velocity 4.351 km / s
Physical Properties
Medium diameter approx. 373 km
Albedo 0.08-0.09
Absolute brightness 5.4 - 5.6 mag
history
Explorer Robert L. Millis
Marc W. Buie
Date of discovery February 6, 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.

2002 CY 248 is a large trans-Neptunian object in the Kuiper belt , which is classified as Cubewano (CKBO) in terms of railway dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2002 CY 248 was discovered on February 6, 2002 by Robert Millis and Marc Buie with the 4-meter telescope at the Kitt Peak Observatory ( Arizona ). The discovery was announced on March 19, 2002 along with 2001 DU 108 , 2002 CZ 248 , 2002 CA 249 , 2002 CB 249, and 2002 CC 249 .

The observation arc of the planetoid begins with the official observation on February 6, 2002. Since then, the planetoid has been observed through various earth-based telescopes. In December 2018, a total of 131 observations were made over a period of 17 years. The last observation so far was carried out in March 2018 at the Pan-STARRS telescope (PS1). (As of March 14, 2019)

properties

Orbit

2002 CY 248 orbits the sun in 313.08 years on a slightly elliptical orbit between 39.20  AU and 53.02 AU from its center. The orbital eccentricity is 0.150, the orbit is 7.06 ° inclined to the ecliptic . The planetoid is currently 50.79 AU from the sun. The next time it passes through perihelion in 2129, the last perihelion should have been in 1816.

Both Marc Buie ( DES ) and the Minor Planet Center classify the asteroids as Cubewano , where he ground dynamically to the "hot" classical KBO heard; the latter also lists it as a non-SDO and generally as a “distant object” .

size

A diameter of 373 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.6  m . Based on this diameter, the total area is around 437,000 km². The apparent magnitude of 2002 CY 248 is 22.41  m .

Since it is conceivable that 2002 CY 248 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 2002 CY 248 to perhaps is a dwarf planet.

Determinations of the diameter for 2002 CY 248
year Dimensions km source
2018 404.0 Johnston
2018 373.0 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 02CY248 . SwRI (Space Science Department). Retrieved March 14, 2019.
  2. ↑ a b MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Accessed March 14, 2019.
  3. ↑ a b c (524435) 2002 CY248 at the IAU Minor Planet Center (English) Retrieved March 14, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2002-F27: 2001 DU108, 2002 CY248, 2002 CZ248, 2002 CA249, 2002 CB249, 2002 CC249 . IAU . March 19, 2002. Retrieved March 14, 2019.
  6. ↑ (524435) 2002 CY248 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 14, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 14, 2019.
  8. ↑ (524435) 2002 CY248 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 March 14, 2019.
  10. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 14, 2019.