MSGID: 1:153/757.0 45cd1e0b   
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   CHRS: LATIN-1 2   
                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                    2023 May 28   
      A pair of asteroids are shown with a large, elongated and cratered one   
        on the left and a much smaller one on the far right. Please see the   
                    explanation for more detailed information.   
      
                         Ida and Dactyl: Asteroid and Moon   
                     Image Credit: NASA, JPL, Galileo Mission   
      
      Explanation: This asteroid has a moon. The robot spacecraft Galileo on   
      route to Jupiter in 1993 encountered and photographed two asteroids   
      during its long interplanetary voyage. The second minor planet it   
      photographed, 243 Ida, was unexpectedly discovered to have a moon. The   
      tiny moon, Dactyl, is only about 1.6 kilometers across and seen as a   
      small dot on the right of the sharpened featured image. In contrast,   
      the potato-shaped Ida is much larger, measuring about 60 kilometers   
      long and 25 km wide. Dactyl is the first moon of an asteroid ever   
      discovered -- now many asteroids are known to have moons. The names Ida   
      and Dactyl are from Greek mythology.   
      
                         Tomorrow's picture: sea blue sky   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
   --- BBBS/Li6 v4.10 Toy-6   
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