817 Annika

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817 Annika
Discovery
Discovered byMax Wolf
Discovery date6 February 1916
Designations
MPC designation(817) Annika
1916 YW
Main belt (Eunomia family)
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc100.19 yr (36596 d)
Aphelion3.0538 AU (456.84 Gm)
Perihelion2.1292 AU (318.52 Gm)
2.5915 AU (387.68 Gm)
Eccentricity0.17840
4.17 yr (1523.8 d)
90.5151°
0° 14m 10.5s / day
Inclination11.336°
125.626°
284.728°
Physical characteristics
Mean radius
11.025±0.85 km,[1] 11 km[2]
Mass~1.5×1016 kg (estimate)
Mean density
~2.7 g/cm³ (estimate)[3]
0.440 d,[4] 10.56 h (0.440 d)[1]
0.1740±0.030
S-type asteroid
10.6

817 Annika is a mid-sized Eunomian asteroid.

References[edit]

  1. ^ a b c "817 Annika (1916 YW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.
  2. ^ "Supplemental IRAS Minor Planet Survey". Archived from the original on 2006-06-23.
  3. ^ G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158: 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
  4. ^ "PDS lightcurve data". Archived from the original on 2006-06-14.

External links[edit]