HD 220820

Spectroscopic binary orbits from photoelectric radial velocities. Paper 175: BD+48 1048, HR 1736, HR 3416, and HD 199378/9 Not Available
The nature of HD 220820 Not Available
Spectroscopic binary orbits from photoelectric radial velocities Paper 122: HD 220820 Not Available
Objective-prism discoveries in the northern sky - II. Five tables list the observed characteristics of 244 northern hemispherestars recorded in 100 108 A/mm dispersion plates at H-gamma wavelengths.The 5 x 5 deg fields contained a number of suspected weak-metal objects.Listings are divided into peculiar A stars, metallic line and deltaDelphini stars, high luminosity objects, Ca II emission stars of the Gand K type, and composite spectra.

INHABITED SKY