2007 JF 45

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Asteroid
2007 JF 45
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type Plutino ,
"Distant Object"
Major semi-axis 39.654  AU
eccentricity 0.086
Perihelion - aphelion 36.24 AU - 43.068 AU
Inclination of the orbit plane 11 °
Length of the ascending node 176.2 °
Argument of the periapsis 347.4 °
Time of passage of the perihelion December 6, 1960
Sidereal period 249 a 8.5 M
Mean orbital velocity 4.691 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.9 likes
history
Explorer Palomar observatory
Date of discovery May 12, 2007
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.

2007 JF 45 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino in terms of orbital dynamics . Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2007 JF 45 was on 12 May 2007 by a team of astronomers at Palomar Observatory ( California discovered). The discovery was announced on July 15, 2016 after confirmation by the Pan-STARRS Telescope ( Maui ) by B. Gibson, T. Goggia, N. Primak, A. Schultz, and M. Willman.

The observation arc of the planetoid begins with the official discovery observation on May 12, 2007. So far, the planetoid has only been observed by the Pan-STARRS and the Palomar observatory. In September 2018, a total of 225 observations were made over a period of 12 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

2007 JF 45 orbits the sun in 249.71 years on a slightly elliptical orbit between 36.24  AU and 43.07 AU from its center. The orbit eccentricity is 0.086, the orbit is 11.01 ° inclined to the ecliptic . The planetoid is currently 39.60 AU from the sun. He passed through perihelion for the last time in 1960, so the next perihelion is likely to take place in 2210.

Marc Buie ( DES ) classifies the planetoid as Plutino ( 2: 3 resonance with Neptune ), while the Minor Planet Center does not have a specific classification; the latter lists 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 area is about 312,000 km². The apparent magnitude of 2007 JF 45 is 22.10  m .

Since it is conceivable that 2007 JF 45 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 2007 JF 45 to perhaps is a dwarf planet.

Provisions of the diameter for 2007 JF 45
year Dimensions km source
2018 293.0 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 07JF45 . 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 2007 JF45 at the IAU Minor Planet Center (English). Accessed March 27, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-N116: 2007 JF45 . IAU . July 15, 2016. Retrieved March 27, 2019.
  6. ↑ 2007 JF45 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. ↑ 2007 JF45 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.