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

[Archduke]

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!

 

[Janus]

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.

 

[Archduke]

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?

 

[Janus]

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.

 

[Archduke]

Ok, thanks a lot.

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

 

[cadnr]

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.