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Adrastea
 

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239 Adrastea




  Discovery Date August 18 , 1884
  Designations A915 TD, 1955 MK<sub>1</sub>,<br>1956 UJ
  Category Main Belt
  Epoch 30 January , 2005 ( JD 24534005)
  Semimajor 445774 G M (298 AU )
  Perihelion 34397 Gm (2299 AU)
  Aphelion 547578 Gm (366 AU)
  Eccentricity 0228
  Period 1878771 D (514 A )
  Inclination 6169 °
  Asc Node 180904°
  Arg Peri 20906°
  Mean Anomaly 146519°
  Speed 1725 km/ S
  Dimensions 420 km
  Mass ''unknown''
  Density ''unknown''
  Gravity ''unknown''
  Escape Velocity ''unknown''
  Rotation ''unknown''
  Spectral Class ''unknown''
  Abs Mag 103
  Albedo ''unknown''