PapersStormont & Jackson, 1891 - Astronomy |
Common terms and phrases
April armature Atlas Stellarum Variabilium brightness chart and catalogue chronograph clamp clock collimation collimation axis column Comparison Stars Comparisons I II correction d'Arrest's DECLINATION determined dots equatorial Eye tired eye-piece flexure formula GEORGETOWN COLLEGE OBSERVATORY glass Herculis II Mean II-III interval invis July July 11 June 14 latitude latter light curve M. T. Sky Comparisons magnitudes measured meridian METHOD BY STEPS micrometer microscope minima Notes NOVA PERSEI numbers object-glass observations Period PHOTO LITH photochronograph photographic transit photometric plate-holder position probable error R₁ R₂ reduction Remarks DECIMAL METHOD Remarks h 85 reticle revolution RIGHT ASCENSION Schönfeld screw sensitive plate SERIES single pair star trail step value Steps Magn taken transit instrument tube Variable Stars Variation vertical wire zenith distance zenith telescope ΙΣ