Is this an odontoglossum or an oncidium hybrid, perhaps? NOID blooming for the first time in my care, and I like to mark my babies with a good guess. I'm thinking odon.
Oncidium Hybrid Orchid - New Georgia Encyclopedia
White Oncidium hybrid | Seen at Mauna Kea Orchids, Big Islan… | Flickr
Oncidium (Dancing Lady Orchid): In-Depth Care Guide - Brilliant Orchids