Do we have a definition of a star that makes a distinction between the glow from compaction and fusion, or is it even distinguishable? If the star isn't shining yet, would it still be shrouded by the cloud from which it was born, until enough light and solar wind blows it away? Also, what frequency are you wanting, as the surface temp may have it glowing in infrared before hotter temperatures are achieved via compaction, deuterium fusion and protium fusion, I suspect.
Et tu BAUT? Quantum mutatus ab illo.