(536919) 2015 FL 345

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Asteroid
2015 FL 345
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO  ( "Hot" )
"Distant Object"
Major semi-axis 46,173  AU
eccentricity 0.131
Perihelion - aphelion 40.135 AU - 52.211 AU
Inclination of the orbit plane 5.4 °
Length of the ascending node 116.9 °
Argument of the periapsis 174.8 °
Time of passage of the perihelion March 1, 2076
Sidereal period 313 a 9.0 M
Mean orbital velocity 4.347 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.9 likes
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery March 21, 2015
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.

2015 FL 345 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 is one of the dwarf planet candidates .

discovery

2015 FL 345 was discovered on March 21, 2015 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 17, 2016.

After its discovery, in 2015 FL 345 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to February 1, 2011, thus extending its observation period by four years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In December 2018 there were a total of 107 observations over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in May 2018. (As of March 27, 2019)

properties

Orbit

2015 FL 345 orbits the sun in 313.75 years on a slightly elliptical orbit between 40.13  AU and 52.21 AU from its center. The orbital eccentricity is 0.131, the orbit is inclined 5.36 ° with respect to the ecliptic . The planetoid is currently 44.36 AU from the sun. He will next pass perihelion in 2076, so the last perihelion should have occurred in 1762.

Marc Buie ( DES ) classifies the asteroid as Cubewano , whereby it belongs to the orbital dynamics “hot” classical KBO , while the Minor Planet Center does not have a specific classification; it classifies it as a non-SDO and generally as a “distant object” .

size

A diameter of 315 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.9  m . Based on this diameter, the total surface area is around 312,000 km 2 . The apparent magnitude of 2015 FL 345 is 22.41  m .

Since it is conceivable that 2015 FL 345 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 2015 FL 345 to perhaps is a dwarf planet.

Provisions of the diameter for 2015 FL 345
year Dimensions km source
2018 336.0 Johnston
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 15FL345 . SwRI (Space Science Department). Retrieved March 27, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 27, 2019.
  3. ↑ a b c (536919) 2015 FL345 at IAU Minor Planet Center (English) Retrieved March 27, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-0114: 2015 FL345 . IAU . July 17, 2016. Accessed March 27, 2019.
  6. ↑ (536919) 2015 FL345 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 27, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 27, 2019.
  8. ↑ (536919) 2015 FL345 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 27, 2019.