Wow thats nice, and you say she isn’t similar to Celestia but when i saw that picture i immedietly thougt that it is Tia, only a moment later i started wondering and had to check the tags

Aurora borealis hair?  
At this time of year  
in this part of the internet  
localized entirely within your featured image?
 
No.

What beautiful golden locks!

I like it, could be a cute sun worshiping oc such. Or a alternate celestia that is just a unicorn.  
And her eyes are red rather then magenta so yeah :p