1866 Sisyphus

1866 Sisyphus
Discovery[1]
Discovered byP. Wild
Discovery siteZimmerwald Obs.
Discovery date5 December 1972
Designations
(1866) Sisyphus
Pronunciation/ˈsɪsɪfəs/
Named after
Σίσυφος Sīsyphos (Greek mythology)[2]
1972 XA
AdjectivesSysiphean /sɪsɪˈfiːən/,[4] Sisyphian /sɪˈsɪfiən/[5]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc61.55 yr (22,482 days)
Earliest precovery date26 January 1955
Aphelion2.913 AU (435.8 Gm)
Perihelion0.8747312 AU (130.85792 Gm)
1.8936992 AU (283.29337 Gm)
Eccentricity0.5386
2.61 yr (952 days)
85.918°
0° 22m 41.88s / day
Inclination41.202°
63.498°
293.09°
Known satellites1[a][6][7][8]
(Orbital period of 27.16±0.05 h)
Earth MOID0.1045 AU (15.63 Gm)
Mars MOID0.1291 AU (19.31 Gm)
Physical characteristics
Dimensions

1866 Sisyphus /ˈsɪsɪfəs/ is a binary[8] stony asteroid, near-Earth object and the largest member of the Apollo group, approximately 7 kilometers in diameter.

It was discovered on 5 December 1972, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and given the provisional designation 1972 XA. It was named after Sisyphus from Greek mythology.[3][20]

  1. ^ a b c d e Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference MPC-Sisyphus was invoked but never defined (see the help page).
  4. ^ "Sisyphean". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  5. ^ "Sisyphian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  6. ^ a b Cite error: The named reference Ostro-1991 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stephens-2011j was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Warner-2016n was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference lcdb was invoked but never defined (see the help page).
  13. ^ a b c Cite error: The named reference Delbo-2003 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference Delbo-2011 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Schober-1993 was invoked but never defined (see the help page).
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  18. ^ Cite error: The named reference Mainzer-2011 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference Thomas-2014 was invoked but never defined (see the help page).
  20. ^ Cite error: The named reference JPL-binary-neas was invoked but never defined (see the help page).


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