5145 Pholus

5145 Pholus
Discovery[1]
Discovered by
Discovery siteKitt Peak National Obs.
Discovery date9 January 1992
Designations
(5145) Pholus
Pronunciation/ˈfoʊləs/[3]
Named after
Φόλος Pholos
(Greek mythology)[4]
1992 AD
Symbol or (astrological)
Orbital characteristics[5]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 1[5] · 0[1]
Observation arc40.74 yr (14,881 d)
Earliest precovery date22 July 1977
Aphelion31.943 AU
Perihelion8.7531 AU
20.348 AU
Eccentricity0.5698
91.79 yr (33,526 d)
117.26°
0° 0m 38.52s / day
Inclination24.617°
119.44°
354.77°
Jupiter MOID3.495 AU
Saturn MOID0.34961[1]
TJupiter3.21
Physical characteristics
Dimensions310 km × 160 km × 150 km[8]
9.980 h[8]
  • 0.04 (assumed)[8]
  • 0.044±0.013[5]
  • 0.155±0.076[9]
21.62[13]
16.3 (Perihelic opposition)

5145 Pholus /ˈfoʊləs/ is an eccentric centaur in the outer Solar System, approximately 180 kilometers (110 miles) in diameter, that crosses the orbit of both Saturn and Neptune. It was discovered on 9 January 1992 by American astronomer David Rabinowitz (uncredited) of UA's Spacewatch survey at the Kitt Peak National Observatory in Arizona, United States. The very reddish object has an elongated shape and a rotation period of 9.98 hours.[18] It was named after the centaur Pholus from Greek mythology.[1]

  1. ^ a b c d e f Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference IAUC was invoked but never defined (see the help page).
  3. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  4. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference jpldata was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference johnstonsarchive-TNO-list was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Ferret was invoked but never defined (see the help page).
  8. ^ a b c d e f Cite error: The named reference Tegler-2005 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Duffard-2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Davies-1995 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Perna-2010 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Belskaya-2015 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Peixinho-2012 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Romanishin-1999 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Romanishin-2005 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Davies-1998b was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference lcdb was invoked but never defined (see the help page).