(26308) 1998 SM165

(26308) 1998 SM165
Hubble Space Telescope image of 1998 SM165 and its companion, taken in December 2001
Discovery[1]
Discovered byN. Danzl
Discovery siteKitt Peak Obs.
Discovery date16 September 1998
Designations
(26308) 1998 SM165
1998 SM165
TNO[2] · twotino[3][4][5]
Kozai · distant[1]
Orbital characteristics[2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 2
Observation arc32.26 yr (11,784 days)
Earliest precovery date12 October 1982
Aphelion64.968 AU
Perihelion29.866 AU
47.417 AU
Eccentricity0.3701
326.52 yr (119,261 days)
47.484°
0° 0m 10.8s / day
Inclination13.521°
183.21°
130.22°
Known satellitesS/2001 (26308) 1[5]
(96±12 km in diameter)[6]
Physical characteristics
Dimensions268±28 km (derived)[5]
287±36 km[6]
Mass(6.87±0.018)×1018 kg[5]
Mean density
0.51+0.29
−0.14 g/cm3[6]
8.40±0.05 h[6]
0.07±0.02[6]
5.7[2]

(26308) 1998 SM165 is a resonant trans-Neptunian object and binary system from the Kuiper belt in the outermost regions of the Solar System. It was discovered on 16 September 1998, by American astronomer Nichole Danzl at the Kitt Peak National Observatory in Arizona.[1] It is classified as a twotino and measures approximately 280 kilometers in diameter. Its minor-planet moon was discovered in 2001.[5]

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  2. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference MPEC 2009-J35 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Buie was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Johnstons-Archive was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Spencer2006 was invoked but never defined (see the help page).