(487581) 2015 BE 519

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Asteroid
(487581) 2015 BE 519
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 47.72  AU
eccentricity 0.063
Perihelion - aphelion 44.73 AU - 50.71 AU
Inclination of the orbit plane 24.8 °
Length of the ascending node 153.1 °
Argument of the periapsis 290.6 °
Time of passage of the perihelion August 21, 1948
Sidereal period 329 a 7.9 M
Mean orbital velocity 4.276 km / s
Physical Properties
Medium diameter approx. 329 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.8 mag
history
Explorer Pan-STARRS
Date of discovery 20th January 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.

(487581) 2015 BE 519 is a large trans-Neptunian object in the Kuiper Belt , which is classified as a Scattered Disk Object (SDO) in terms of orbit dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2015 BE 519 was discovered on January 20, 2015 by a team of astronomers as part of the Pan-STARRS project at the Haleakalā Observatory ( Maui ). The discovery was announced on July 19, 2016 after confirmation by the Mauna-Kea ( Hawaii ) and Las Campanas ( Chile ) observatories by astronomers Scott Sheppard , Chad Trujillo and David Tholen , the planetoid was later received by the IAU the minor planet number 487581 .

After its discovery, in 2015 BE 519 could be identified on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ) going back to December 7, 2002, thus changing its observation period Extend 13 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 108 observations were made over a period of 14 years. The last observation so far was made in March 2016 at the Las Campanas Observatory. (As of March 24, 2019)

properties

Orbit

2015 BE 519 orbits the sun in 329.66 years on a slightly elliptical orbit between 44.73  AU and 50.71 AU from its center. The orbital eccentricity is 0.063, the web is 24.76 ° to the ecliptic inclined . The planetoid is currently 47.23 AU from the sun. He passed through perihelion for the last time in 1948, so the next perihelion is likely to take place in 2278.

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 Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of 329 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.8  m . Based on this diameter, the total surface area is around 340,000 km 2 . The apparent magnitude of 2015 BE 519 is 22.28  m .

Since it is conceivable that 2015 BE 519 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 believes that it is in 2015 BE 519 to perhaps is a dwarf planet.

Provisions of the diameter for 2015 BE 519
year Dimensions km source
2018 352.0 Johnston
2018 329.0 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 487581 . SwRI (Space Science Department). Retrieved March 24, 2019.
  2. ↑ a b c (487581) 2015 BE519 at the IAU Minor Planet Center (English). Accessed March 24, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2016-O275: 2015 BE519 . IAU . July 19, 2016. Accessed March 24, 2019.
  5. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 24, 2019.
  6. ↑ (487581) 2015 BE519 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 24, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 24, 2019.
  8. ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 24, 2019.
  9. ↑ (487581) 2015 BE519 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 March 24, 2019.