Page:Star Lore Of All Ages, 1911.pdf/591

Secchi's Spectroscopic Star Types

	Characteristics	Star Names
Type II. Solar Stars (yellowish like sun)	Fine, dark, metallic lines	Capella Arcturus
Type III. Orange and reddish stars	Many dark bands	α Herculis Mira Antares A majority of the variable stars
Type IV. Blood red in tint	Dark bands or flutings, the reverse of Type III. as to shading	About 50 stars of this type
Type V.	Bright lines	Number about 70 Situated near the middle of the Galaxy

Scintillation

Secchi's type	Mean Scintillation
III	87
III	79
III	59

Scintillation is most pronounced in January and February, and magnetic storms and violent scintillations are absolutely coincident in point of time.

Stars Approaching the Earth

Star Name	Speed in Miles per Second
	Potsdam	Todd[1]	Greenwich	Vogel
α Arictis		11.7		09.2
γ Leonis		25.1
Spica	14	10.6	17	09.2

1. From Todd's Astronomy.