Results 1 to 3 of 3

Thread: Star shade - how long to fly to new position when pointing telescope

  1. #1
    Join Date
    Sep 2020
    Posts
    1

    Star shade - how long to fly to new position when pointing telescope

    The star shade... imagine it's all lined up to make an observation. Then the telescope is pointed in a different direction. How long does it take the star shade to fly to the new location to line up again? Do both space craft fly to new locations when the telescope points? Are both space craft orbiting opposite sides of a Legrange point? Does one or both of the spacecraft need a lot of fuel?
    Thanks!
    Mark Johnson.

  2. #2
    Join Date
    Jul 2005
    Posts
    19,789
    The Star Shade would supposedly function with existing telescopes, like the James Webb. If it were deployed with the James Webb, then the telescope would sit at the L2 Lagrange point, using fuel for stationkeeping and gyroscopes to slew on to new targets. The Star Shade would be positioned tens of thousands of kilometres away, and would use fuel to fly to a new position each time the telescope changed target. I guess how long it would take and how much fuel it would use would depend on the final design of the Star Shade, and how far apart successive telescopic targets were.

    Grant Hutchison

  3. #3
    Join Date
    Jun 2006
    Posts
    4,880

    Many Considerations

    Quote Originally Posted by grant hutchison View Post
    The Star Shade would supposedly function with existing telescopes, like the James Webb. If it were deployed with the James Webb, then the telescope would sit at the L2 Lagrange point, using fuel for stationkeeping and gyroscopes to slew on to new targets. The Star Shade would be positioned tens of thousands of kilometres away, and would use fuel to fly to a new position each time the telescope changed target. I guess how long it would take and how much fuel it would use would depend on the final design of the Star Shade, and how far apart successive telescopic targets were.

    Grant Hutchison
    Quote Originally Posted by markjnet View Post
    The star shade... imagine it's all lined up to make an observation. Then the telescope is pointed in a different direction. How long does it take the star shade to fly to the new location to line up again? Do both space craft fly to new locations when the telescope points? Are both space craft orbiting opposite sides of a Legrange point? Does one or both of the spacecraft need a lot of fuel?
    Thanks!
    Mark Johnson.
    Another possibility.

    From the Wiki article:

    The possibility of two starshades is also a consideration. One starshade to point towards the desired target while the other moves into position for the next target.
    Reference is here:

    https://en.wikipedia.org/wiki/New_Worlds_Mission

    Certainly a fascinating project, especially being able to use existing telescopes.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •