<p>On the following page, </p>

<p><a href="http://www.uni.edu/morgans/astro/course/Notes/section2/spectraltemps.html" rel="nofollow noreferrer">http://www.uni.edu/morgans/astro/course/Notes/section2/spectraltemps.html</a></p>

<p>It mentions Main, Giants and SuperGiants.</p>

<p>However for Dwarf Stars (e.g. D, Sd) , do I apply Main Sequence to the solar type?</p>

<p>For other types, IV, II, do I apply Main Sequence / Subgiant / Giant to the type?</p>

<p>If you look at the linked webpage, you'll see it mentions Types (V,III,I) but for instance where would Procyon (F5IV-V), Sargas (F1II) fit or should there be a different table for types IV, II?</p>

<p>Would groups (D, sd, IV,m II) have a different table?  Rigil Kentaurus (G2V) would clear fit into Main Sequence.</p>

CC BY-SA 3.0
2017-02-09T12:38:38.287Z
You need separate tables or hope that an interpolation is not too far out for types IV and II. You have no hope of extrapolating to sd or D, these definitely need separate interpretation and tables.
ProfRob
<dwarf-star><spectral-type>
Solar Spectral Types and Dwarf Stars
MiscellaneousUser
# Solar Spectral Types and Dwarf Stars

(Asked by: username_0 on 2017-02-08)

On the following page,

<http://www.uni.edu/morgans/astro/course/Notes/section2/spectraltemps.html>

It mentions Main, Giants and SuperGiants.

However for Dwarf Stars (e.g. D, Sd) , do I apply Main Sequence to the solar type?

For other types, IV, II, do I apply Main Sequence / Subgiant / Giant to the type?

If you look at the linked webpage, you'll see it mentions Types (V,III,I) but for instance where would Procyon (F5IV-V), Sargas (F1II) fit or should there be a different table for types IV, II?

Would groups (D, sd, IV,m II) have a different table? Rigil Kentaurus (G2V) would clear fit into Main Sequence.

**Tags:** dwarf-star, spectral-type
> **Comments:**
> **username_1**: You need separate tables or hope that an interpolation is not too far out for types IV and II. You have no hope of extrapolating to sd or D, these definitely need separate interpretation and tables.  

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