243 Ida

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243 Ida
243 ida crop.jpg
Galileo eemage o 243 Ida. The teenie dot tae the richt is its muin, Dactyl.
Discovery[1]
Discovered biJohann Palisa
Discovery steidVienna Obs.
Discovery dateSeptember 29, 1884
Designations
MPC designation(243) Ida
Main belt (Koronis)[2]
AdjectivesIdean
Orbital chairactereestics[3]
Epoch 31 July 2016 (JD 2457600.5)
Aphelion2.979 AU (4.457×1011 m)
Perihelion2.743 AU (4.103×1011 m)
2.861 AU (4.280×1011 m)
Eccentricity0.0411
1,767.644 days (4.83955 a)
0.2036°/d
38.707°
Inclination1.132°
324.016°
110.961°
Kent satellitesDactyl
Pheesical chairactereestics
Dimensions59.8 × 25.4 × 18.6 km[4]
Mean radius
15.7 km[5]
Mass4.2 ± 0.6 ×1016 kg[5]
Mean density
2.6 ± 0.5 g/cm3[6]
Equatorial surface gravity
0.3–1.1 cm/s2[7]
4.63 hours (0.193 d)[8]
North pole right ascension
168.76°[9]
North pole declination
−2.88°[9]
0.2383[3]
Temperatur200 K (−73 °C)[2]
S[10]
9.94[3]

243 Ida is an asteroid in the Koronis faimily o the asteroid belt.

References[eedit | eedit soorce]

  1. Raab 2002
  2. 2.0 2.1 Holm 1994
  3. 3.0 3.1 3.2 JPL 2008
  4. Belton et al. 1996
  5. 5.0 5.1 Britt et al. 2002, p. 486
  6. Belton, M. J. S.; Chapman, C. R.; Thomas, P. C.; Davies, M. E.; Greenberg, R.; Klaasen, K.; et al. (1995). "Bulk density of asteroid 243 Ida from the orbit of its satellite Dactyl". Nature. 374 (6525): 785–788. Bibcode:1995Natur.374..785B. doi:10.1038/374785a0. 
  7. Thomas et al. 1996
  8. Vokrouhlicky, Nesvorny & Bottke 2003, p. 147
  9. 9.0 9.1 Seidelmann Archinal A'hearn et al. 2007, p. 171
  10. Wilson, Keil & Love 1999, p. 479

Soorces[eedit | eedit soorce]