<p>I am trying to find the initial x,y,z velocity components of the Epsilon Lyrae stars. How might I go about doing this? The radial velocities are available on Wikipedia, but I am not sure how to use that data for my purpose.</p>

CC BY-SA 4.0
2019-10-10T02:31:38.463Z
Do you mean the cartesian coordinates of each component of the binary or of the system relative to the Solar System or to the Galactic Center ? To put it another way: what's the origin of the x,y,z system that you want ?
astrosnapper
CC BY-SA 4.0
2019-10-10T03:00:35.370Z
@astrosnapper I mean the cartesian coordinates of each component
Stephane Hatgis-Kessell
CC BY-SA 4.0
2019-10-10T09:06:20.070Z
I think you didn't understand astrosnapper's question; "To put it another way: what's the origin...?"
uhoh
CC BY-SA 4.0
2019-10-10T16:02:43.373Z
Along with clearing up the orientation of the coordinates to use, you'll want to get the proper motion of the stars in addition to the radial velocity.
antlersoft
CC BY-SA 4.0
2019-10-10T17:01:28.297Z
This needs clarifying. What do you mean by "initial velocity"? This is a multiple system where the stars "orbit" each other.
ProfRob
<orbit><velocity>
Find x,y,z velocity component of a star?
Stephane Hatgis-Kessell
# Find x,y,z velocity component of a star?

(Asked by: username_0 on 2019-10-10)

I am trying to find the initial x,y,z velocity components of the Epsilon Lyrae stars. How might I go about doing this? The radial velocities are available on Wikipedia, but I am not sure how to use that data for my purpose.

**Tags:** orbit, velocity

> **Comments:**
> **username_1**: Do you mean the cartesian coordinates of each component of the binary or of the system relative to the Solar System or to the Galactic Center ? To put it another way: what's the origin of the x,y,z system that you want ?  
> **username_0**: @username_1 I mean the cartesian coordinates of each component  
> **username_2**: I think you didn't understand username_1's question; "To put it another way: what's the origin...?"  
> **username_3**: Along with clearing up the orientation of the coordinates to use, you'll want to get the proper motion of the stars in addition to the radial velocity.  
> **username_4**: This needs clarifying. What do you mean by "initial velocity"? This is a multiple system where the stars "orbit" each other.  

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## 0 answers

