Not quite under the skin

Space/Science » in reply to re: Maybe somewhere, Ptolemy was right...

Adam — 7/5/2005 11:05:36 AM (archived)

Hi All

Pluto/Charon mass ratio is about ~ 0.12 and their separation is ~ 19,600 km, so the barycentre is ~ 2300 km from Pluto's centre, about ~ twice its radius. So they could be called a double planet.

Adam

The whole thread (14 posts)

Impossible exoplanet? - Raoul - 6/30/2005 9:04:39 PM
- Fortunately, no one told the planet that such a thing was "impossible" - Larry J - 7/4/2005 7:01:42 PM
  - Another inventor of the impossible, or so we are told... - ljk - 7/5/2005 12:02:03 PM
- Maybe somewhere, Ptolemy was right... - LJK - 7/1/2005 2:21:51 AM
  - Upper size limit for "heavy planets" like this new one? - Buck Galaxy - 7/1/2005 6:15:32 AM
    - Dark Solar Systems - Robert Bradbury - 7/1/2005 5:05:05 PM
      - What about planets orbiting planets (no star) "solar" systems... - Scott Evil - 7/1/2005 9:37:10 PM
        
        They're called "moons", you know... (n/t) - Nick Hoffman - 7/2/2005 5:06:48 AM
        
        Can I do the nerd joke? - ljk - 7/5/2005 12:08:30 PM
    - re: Upper size limit for "heavy planets" like this new one? - Robert Bradbury - 7/1/2005 4:52:32 PM
  - re: Maybe somewhere, Ptolemy was right... - gbaikie - 7/1/2005 4:31:46 AM
    - re: Maybe somewhere, Ptolemy was right... - Robert Bradbury - 7/1/2005 4:13:22 PM
      - Not quite under the skin - Adam - 7/5/2005 11:05:36 AM
      - Transiting Hot Saturn Around HD 149026 With a Large Dense Core - LJK - 7/4/2005 4:20:04 PM

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The whole thread (14 posts)