(523642) 2010 SS 43

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Asteroid
(523642) 2010 SS 43
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO ),
"Distant Object"
Major semi-axis 45,151  AU
eccentricity 0.214
Perihelion - aphelion 35,488 AU - 54,813 AU
Inclination of the orbit plane 34.5 °
Length of the ascending node 341.4 °
Argument of the periapsis 111.4 °
Time of passage of the perihelion May 26, 2054
Sidereal period 303 a 4.7 M
Mean orbital velocity 4.396 km / s
Physical Properties
Medium diameter approx. 302 km
Albedo 0.08-0.09
Absolute brightness 5.9 - 6.0 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 17th September 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.

(523642) 2010 SS 43 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 SS 43 was carried out on September 17, 2010 by a team of astronomers consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, as part of the Pan-STARRS project with the 1.8 m -Ritchey Chretien Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 26, 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number five hundred and twenty-three thousand six hundred and forty-two .

After its discovery, SS 43 could be identified in photos taken as part of the Sloan Digital Sky Survey (SDSS) program at Apache Point Observatory ( New Mexico ) going back to January 21, 2009 and so on extend its observation period by one and a half years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, a total of 62 observations were made over a period of 10 years. The last observation so far was carried out again at the Pan-STARRS telescope in January 2018. (As of April 3, 2019)

properties

Orbit

2010 SS 43 orbits the sun in 303.39 years in an elliptical orbit between 35.48  AU and 54.81 AU from its center. The orbit eccentricity is 0.214, the orbit is inclined 34.47 ° with respect to the ecliptic . The planetoid is currently 39.10 AU from the Sun. He will next pass perihelion in 2054, so the last perihelion should have occurred in 1750.

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 SS 43 is 21.93  m .

Since it is conceivable that 2010 SS 43 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 2010 SS 43 to perhaps is a dwarf planet.

Provisions of the diameter for 2010 SS 43
year Dimensions km source
2018 293.0 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 523642 . SwRI (Space Science Department). Retrieved April 3, 2019.
  2. ↑ a b c (523642) 2010 SS43 at the IAU Minor Planet Center (English) Retrieved on April 3, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2016-O317: 2010 SS43 . IAU . July 26, 2016. Retrieved April 3, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved April 3, 2019. Reference there: MPC 111778
  6. ↑ (523642) 2010 SS43 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved April 3, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved April 3, 2019.
  8. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved April 3, 2019.
  9. ↑ (523642) 2010 SS43 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  10. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved April 3, 2019.