re: Alberto? It was no joke; GQ Lupi does indeed have a planet.
The planet's orbital period is estimated to be 1200 years so there's not much Doppler due to its orbital velocity - but the Doppler component due to rotation about a planet/moon CG could be significantly greater. Hopefully, the planets IR signal will be intense enough to get usable spectral lines for both line-of-sight velocity variations and compositional data.
Somehow, I don't think the investigators will need an e-mail to prompt them to make these measurements ;).