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Radial Velocity of the Sun

  1. Feb 24, 2008 #1

    Does anyone know where to find a value for the radial velocity of the Sun wrt the Earth? I've tried googling, but it always gives the radial velocity wrt the LSR.

    Thanks muchly!
  2. jcsd
  3. Feb 24, 2008 #2


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    Since the Earth orbits the Sun in an eliptical orbit, the Sun's radial velocity with respect to the Earth would vary over the course of a year.
  4. Feb 24, 2008 #3
    Hey, thanks.

    Yes, I appreciate that, but I'm looking for a rough figure/time average, just to compare to my wildly inaccurate value obtained from labs.

    Do you know anywhere where I can find this?
  5. Feb 24, 2008 #4


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    At its maximum it is about 500 meters/sec, and at its minimum 0 meters/sec. Minimums happen in Winter and Summer, maximums in Spring and Fall.
  6. Feb 24, 2008 #5
    Ok, thanks a lot. :smile:

    I guess my value of 18 km/s is a tiny bit out then! :rofl:
  7. Mar 2, 2008 #6
    18 km/s is about the velocity of the Sun relative to the Local Standard Rest Frame, ie. the speed of the sun relative to the other stars in our region of the Galaxy.
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