Studio B at Avatar, NYC.
Moreover, it would appear to be some other project than the Space Oddity 40th as my liner notes suggest that was done at Abbey Road.
According to the studio website, the room has excellent recording and multi-tracking capabilities - in addition to good mixing capability. Thus it would seem to be overkill for the job of exclusively mixing/mastering.
Richard Kingsmill (Triple J FM): "Do you mind if we throw to a song by your old man?.
Duncan Jones (Bowie's Son): "Oh God ... if you have to ... OK ... but have a look at Nick Armstrong and The Thieves"