2020 II/20 UBV Photometry of O & B Stars in Vela J Denoyelle Astron. Astrophys. Suppl. Ser. 27 343 1977 1977A&AS...27..343D Reddening Photometry, UBV Colors Stars, OB Photoelectric UBV values, derived from observations made at the Boyden and ESO observatories, are presented for 358 early-type stars in the Vela section of the southern Milky Way.

rec Record number (if several records for star) --- Seq Running number --- HD HD number --- CPD Cape Photographic Durch. (or CD) --- n_CPD * = CPDzone,num are from Cordoba Durch. --- RAh Right Ascension (1950) hours h RAm Right Ascension (1950) minutes min DE- Declination (1950) sign --- DEd Declination (1950) degrees deg DEm Declination (1950) arcminutes arcmin GLON Galactic longitude deg GLAT Galactic latitude deg Vmag V magnitude 99.99 indicates that the datum is missing. mag u_Vmag Uncertainty flag for V --- B-V (B-V) color index mag u_B-V Uncertainty flag for B-V --- U-B (U-B) color index mag u_U-B Uncertainty flag for U-B --- Sp MK or HD spectral classification --- ref Number of the source for MK Dp. --- Emission E = Halpha emission noted on red plates --- Sp2 Spectral type obtained from Q method --- Q Q parameter Q = (U-B) - 0.72 (B-V) mag E(B-V) (B-V) colour excess mag A(V) A(V) parameter A(V) = 3 x E(B-V) mag m-M Distance modulus mag R Distance of the star pc Z Distance from the galactic plane Z = R*sin(GLAT) pc Nobs Number of observations --- rem * = Comment exists for this star --- Julie Anne Watko SSDOO/ADC 1996May24 II_20.xml