Question about inclination angle UCD

[Baptiste Cecconi]

Thanks all for your answers, I started a draft answer in Slack and then I saw this set of emails. 

In short, yes, src.orbital.inclination is probably the best shot at this point, since it is already used with the same context.

Cheers
Baptiste

> Le 21 mars 2025 à 11:22, Stéphane Erard via semantics <semantics at ivoa.net> a écrit :
> 
> 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
> ____________________________________________
> LIRA, Observatoire de Paris
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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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