Question about inclination angle UCD

[Stéphane Erard]

Hello


In the EPN-TAP interface to exoplanet.eu, we're using src.orbital.inclination for this angle.
- although intended for inclination of an orbit on the ecliptic (in the Solar System), the UCD refers to a generic orbital inclination and seems acceptable in this context.
This UCD is also used in ESAsky, which takes the values from exoplanet.eu <http://exoplanet.eu/>

Hope this helps

Stéphane Erard
____________________________________________
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e-mail : stephane.erard at obspm.fr


> Le 20 mars 2025 à 21:41, Kelle Cruz via semantics <semantics at ivoa.net> a écrit :
> 
> Hi folks IVOA folks,
> 
> (I posted this question in Slack but didn't get a response. I found these email addresses on the wiki and am giving them a try. If there's a better place for discussion, please let me know.)
> 
> What’s the best UCD to use for the inclination angle of a star? That is, the angle of the star’s rotation axis w.r.t. us. Also known as “viewing angle” or the i in vsin(i).  
> 
> I don’t think it’s src.orbital.inclination.  But pos.posAng feels wrong too.  
> 
> Thanks for any advice.
> 
> Kelle
> 
> --
> Kelle Cruz, PhD (she/her, they/them)
> Assoc. Professor, Physics and Astronomy, Hunter College
> CEO, ScienceBetter Consulting, LLC
> CFO, Startorialist, Inc. <http://shop.startorialist.com/>
> Editor-in-Chief, AstroBetter Blog and Wiki <http://astrobetter.com/>
> Research Associate, American Museum of Natural History
> Visiting Scholar, Flatiron Institute



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