Great growing. It's looking really good.
I have Den Stardust 'Choyomi' which is very similar but yellower flowers.
Dendrobium Stardust "Chyomi"
I have some later pictures of it which are a mass of flowers like your first pic, and are down to the nursary I bought it from even though they've opened since, I'm yet to see if I can get it to rebloom myself so I'm really interested how you are caring for yours.
I think this one DOES need a winter rest but as I've only had it less than a month I really don't know how to care for it yet.