Some kind of Brassia cross. There are so many hybrids, though, it is hard to name without a plant tag.
Best of luck~
Maryanne in WMass

I have one just like that and like yours, no name tag when I bought it in June 2013. Just a tag said "intergenetic". So I name it "star". It quite easy to grow. It rebloom for me in July and now another spike is coming. I probably will have flower in early March. or so.

Tanie

Hi
It looks like a Brasia x Oncidium or Miltonia cross to me but there are many Brasia hybids, but who cares it is a nice plant you have and what is in a name.
Regards.

The only real problem with no names is that you cannot get an AOS Award with a no name plant.

A bit annoying that such a desirable orchid doesn't have a name and I suppose orchid societies go to all the trouble of producing judging results because members might see an orchid benched, like it and hunt down the plant on orchid nursery lists.