2002 PJ 149

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Asteroid
2002 PJ 149
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO ( "Hot" ),
"Distant Object"
Major semi-axis 45,359  AU
eccentricity 0.076
Perihelion - aphelion 41.899 AU - 48.818 AU
Inclination of the orbit plane 9.7 °
Length of the ascending node 316.4 °
Argument of the periapsis 193.5 °
Time of passage of the perihelion October 20, 2154
Sidereal period 305 a 5.9 M.
Mean orbital velocity 4.386 km / s
Physical Properties
Medium diameter approx. 358 km
Albedo 0.08-0.09
Absolute brightness 5.3 - 5.7 mag
history
Explorer Marc W. Buie
Susan D. Benecchi (core)
Date of discovery August 11, 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 PJ 149 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 PJ 149 was discovered on August 11, 2002 by Marc Buie and Susan Benecchi (core) with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on September 26, 2002 along with the 2002 PH 149 , 2002 PM 149, and 2002 PG 150 .

The observation arc of the planetoid begins with the official discovery observation on August 11, 2002. So far, the planetoid has only been observed by the Cerro Tololo observatory. In October 2018, there were only 3 observations over a period of one day. The last observation so far was made on August 12, 2002 at the Cerro Tololo Observatory. (As of March 18, 2019)

properties

Orbit

2002 PJ 149 orbits the sun in 305.49 years on a slightly elliptical orbit between 41.90  AU and 48.82 AU from its center. The eccentricity of the orbit is 0.076, the orbit is inclined 9.66 ° to the ecliptic . Currently, the planetoid is 48.64 AU from the sun. The next time it passes through perihelion in 2154, the last perihelion should have occurred in 1849.

Neither Marc Buie ( DES ) nor the Minor Planet Center has a specific classification; the latter only lists it as a non-SDO and generally as a “distant object” . The Johnston's Archive, however, lists him as Cubewano , whereby he would belong to the "hot" classic KBO in terms of rail dynamics .

size

A diameter of 358 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7  m . Based on this diameter, the total surface area is around 403,000 km 2 .

Since it is conceivable that 2002 PJ 149 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 2,002 PJ 149 to perhaps is a dwarf planet.

Provisions of the diameter for 2002 PJ 149
year Dimensions km source
2018 386.0 Johnston
2018 358.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 18, 2019.
  2. ↑ a b c 2002 PJ149 at the IAU Minor Planet Center (English) Retrieved March 18, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ MPC : MPEC 2002-S51: 2002 PH149, 2002 PJ149, 2002 PM149, 2002 PG150 . IAU . September 29, 2002. Retrieved March 18, 2019.
  5. ↑ 2002 PJ149 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 18, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  6. ^ Marc W. Buie : Orbit Fit and Astrometric record for 02PJ149 . SwRI (Space Science Department). Retrieved March 18, 2019.
  7. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 18, 2019.
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 18, 2019.
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 18, 2019.