Where Can I Find the Radial Velocity of the Sun Relative to Earth?

AI Thread Summary
The discussion centers on finding the radial velocity of the Sun relative to Earth, with participants noting that typical searches yield values relative to the Local Standard of Rest (LSR). The Sun's radial velocity varies throughout the year due to Earth's elliptical orbit, reaching a maximum of about 500 meters per second and a minimum of 0 meters per second. The user seeks a rough average value for comparison against their own measurements. Clarification is provided that a previously mentioned value of 18 km/s pertains to the Sun's velocity relative to the LSR, not Earth. Accurate data on the Sun's radial velocity relative to Earth can be challenging to locate.
Archduke
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Hey,

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!
 
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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.
 
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?
 
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.
 
Ok, thanks a lot. :smile:

I guess my value of 18 km/s is a tiny bit out then! :smile:
 
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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