(612911) 2004 XR190

(612911) 2004 XR190
Hubble Space Telescope image of 2004 XR190, taken in October 2010
Discovery[1][2]
Discovered byCFEPS
Discovery siteMauna Kea Obs.
(first observed only)
Discovery date11 December 2004
Designations
(612911) 2004 XR190
Buffy (nickname)[3]
Orbital characteristics[4]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 3
Observation arc14.74 yr (5,383 d)
Earliest precovery date6 December 2002[4][1]
Aphelion63.401 AU
Perihelion51.110 AU
57.255 AU
Eccentricity0.1073
433.24 yr (158,242 d)
277.05°
0° 0m 8.28s / day
Inclination46.794°
252.40°
≈ 4 April 2117[8]
±1 month
285.56°
Physical characteristics
  • 21.8±0.2 (r-band)[10]
  • 21.9+0.8
    −1.5     (G-band)[1]
  • 21.85±0.35 (wide-band)[1]
  • 21.8+0.7
    −0.4     (several other bands)[1]

(612911) 2004 XR190, informally nicknamed Buffy, is a trans-Neptunian object, classified as both a scattered disc object and a detached object, located in the outermost region of the Solar System. It was first observed on 11 December 2004, by astronomers with the Canada–France Ecliptic Plane Survey at the Mauna Kea Observatories, Hawaii, United States.[1][2] It is the largest known highly inclined (> 45°) object. With a perihelion of 51 AU, it belongs to a small and poorly understood group of very distant objects with moderate eccentricities.[10]

  1. ^ a b c d e f g h Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference MPEC was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference New-Scientist was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Swiss was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Lykawka-2007 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference johnstonsarchive-TNO-list was invoked but never defined (see the help page).
  8. ^ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
  9. ^ a b c Cite error: The named reference Schaller-2007 was invoked but never defined (see the help page).
  10. ^ a b c d e Cite error: The named reference Allen-2006 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Brown-dplist was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  13. ^ a b c Cite error: The named reference Bruton was invoked but never defined (see the help page).
  14. ^ 2021 occultation


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