•Parallax
and Trigonometric Methods
–tan λ = Vt/Vr = μd/Vr
–So then d = Vr tanλ/4.74μ [pc]
–Where velocities are in km/s
and proper motion μ is in arcseconds per year.
–Should be something you can
derive (it would be
a good problem to work in your free time)
–