(469372) 2001 QF 298

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Asteroid
(469372) 2001 QF 298
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type Plutino ,
"Distant Object"
Major semi-axis 39,377  AU
eccentricity 0.112
Perihelion - aphelion 34,957 AU - 43,798 AU
Inclination of the orbit plane 22.3 °
Length of the ascending node 164.2 °
Argument of the periapsis 43.5 °
Time of passage of the perihelion December 20, 1911
Sidereal period 247 a 1.2 M
Mean orbital velocity 4.708 km / s
Physical Properties
Medium diameter
Albedo
Absolute brightness 5.43 ± 0.07 mag
Spectral class C
B-V = 0.720 ± 0.020
VR = 0.380 ± 0.020
VI = 0.760 ± 0.060
BR = 1.100 ± 0.020
history
Explorer Marc W. Buie
Robert L. Millis
Lawrence H. Wasserman
Date of discovery August 19, 2001
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.

(469372) 2001 QF 298 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino (2: 3 - resonant KBO ) in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2001 QF 298 was discovered on August 19, 2001 by Marc Buie (official) as well as Robert Millis and Larry Wasserman with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ). The discovery was announced on October 13, 2001 together with 2001 QE 298 , 2001 QG 298 , 2001 QH 298 and 2001 QJ 298 , the planetoid was later given the minor planet number 469372 by the IAU .

After its discovery, in 2001 QF 298 could be identified on photos up to 23 May 2001, which were also taken at the Cerro Tololo Observatory, and thus its observation period was extended by almost three months in order to calculate its orbit more precisely. In April 2017, a total of 136 observations were made over a period of 15 years. The last observation so far was carried out in June 2015 on the Pan-STARRS telescope (PS1). (As of March 8, 2019)

properties

Orbit

2001 QF 298 orbits the sun in 247.10 years on a slightly elliptical orbit between 34.96  AU and 43.80 AU from its center. The orbit eccentricity is 0.112, the orbit is inclined 22.34 ° to the ecliptic . The planetoid is currently 43.49 AU from the Sun. He last passed through perihelion in 1911, so the next perihelion should take place in 2159.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as Plutino ; the latter also lists it as a non- SDO and generally as a “distant object”.

size

A diameter of 408.2 km is currently assumed, based on a reflectivity of 7% and an absolute brightness of 5.4  m . Based on a diameter of 408.2 km, this results in a total surface of around 523,500 km². The apparent magnitude of 2001 QF 298 is 21.72  m .

Since it can be assumed that 2001 QF 298 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for classification as a dwarf planet . Both Mike Brown and Gonzalo Tancredi assume that 2001 QF 298 may be a dwarf planet.

Determination of the diameter for 2001 QF 298
year Dimensions km source
2008 482.0 Tancredi
2012 408.2 +40.2−44.9 Mommert et al. a.
2016 401.35 LightCurve DataBase
2018 421.0 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 469372 . SwRI (Space Science Department). Retrieved March 8, 2019.
  2. ↑ a b MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 8, 2019.
  3. ↑ a b c (469372) 2001 QF298 at the IAU Minor Planet Center (English) Retrieved March 8, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ a b c d M. Mommert u. a .: “TNOs are Cool”: A survey of the trans-Neptunian region. V. Physical characterization of 18 Plutinos using Herschel-PACS observations . In: Astronomy and Astrophysics . 541, no.A93 , February 16, 2012. arxiv : 1202.3657 . bibcode : 2012A & A ... 541A..93M . doi : 10.1051 / 0004-6361 / 201118562 .
  6. ↑ a b LCDB Data for (469372) 2001QF298 . MinorPlanetInfo. 2016. Accessed March 7, 2019.
  7. ↑ a b c S. Tegler u. a .: Two Color Populations of Kuiper Belt and Centaur Objects and the Smaller Orbital Inclinations of Red Centaur Objects (PDF) . In: The Astronomical Journal . 152, No. 6, December 2016, p. 210, 13. bibcode : 2016AJ .... 152..210T . doi : 10.3847 / 0004-6256 / 152/6/210 .
  8. ↑ I. Belskaya et al. a .: Updated taxonomy of trans-neptunian objects and centaurs: Influence of albedo . In: Icarus . 250, April 2015, pp. 482-491. bibcode : 2015Icar..250..482B . doi : 10.1016 / j.icarus.2014.12.004 .
  9. ^ MPC : List Of Transneptunian Objects . IAU . Retrieved March 8, 2019.
  10. ↑ MPC : MPEC 2001-T54: 2001 QE298, 2001 QF298, 2001 QG298, 2001 QH298, 2001 QJ298 . IAU . October 13, 2001. Retrieved March 8, 2019.
  11. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 8, 2019.
  12. ↑ (469372) 2001 QF298 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 8, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  13. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 8, 2019.
  14. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 8, 2019.
  15. ↑ (469372) 2001 QF298 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  16. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 8, 2019.
  17. ^ A b G. Tancredi, S. Favre: DPPH List . In: Dwarf Planets and Plutoid Headquarters, from Which are the dwarfs in the solar system? . September. Retrieved March 8, 2019.