In reference to vsnet-id 50 (Mr. Kinnunen) : the Simbad User's Guide recommend to use three roman letters for each greek letter : alf, bet, gam, etc. For the greek letters mu, nu and pi it is recommended to write mu., nu. and pi. Somewhere I read (but my memory lets me down!) to write miu and niu for the greek letters mu and nu. In our database the variable mu Cep is written mu_Cep. E. Schweitzer - AFOEV