Spica Comparison Table

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Spica comparison table

Subject has right ascension has declination has spectral type is part of has surface temperature is an instance of has inclination has V magnitude has eccentricity has color has been observ has B-V magnitude has distance has absorption line has abundance is usually part of is a kind of has apparent magnitude has synonym has definition has luminosity class has number of star

B star O, B, A, and early F 11000 to 28000 K blue-white He I early star Blue-white star of spectral type B whose spectra are characterized by absorption lines of neutral helium which reach their maximum intensity at B2. The Balmer lines of hydrogen are strong, and lines of singly ionized oxygen and other gases are also present.

giant greater than 1000 Kelvin star High-luminosity star that lies above the main sequence on the Hertzsprung-Russell diagram. III

naked eye star Milky Way greater than 1000 Kelvin for many centuries asterism naked eye object brighter than 5 A star visible without visual aids

spectroscopic binary greater than 1000 Kelvin half the stars in the solar neighborhood are members of star systems binary star Star whose binary nature can be detected from the periodic Doppler shifts of their spectra, owing to their varying velocities in the line of sight. Double-lined spectroscopic binaries have two sets of spectral features, oscillating with opposite phases. Single-lined spectroscopic binaries have only one set of oscillating spectral lines, owing to the dimness of the secondary component. Spectroscopic binaries are typically of spectral type B, with almost circular orbits (whereas long-period M-type binaries have highly eccentric orbits). 2

Spica 13 25 11.5 -11 9 41 B1III-IV+B2V Milky Way 11000 to 28000 K naked eye star i = 65° 0.98 e = 0.146 blue-white for many centuries -0.23 80 pc He I half the stars in the solar neighborhood are members of star systems asterism brighter than 5 HR 5056 A double-lined spectroscopic binary (B1.5 V, late B). Component A (10.9 M_sun) is a beta Cephei star which seems to be near core hydrogen exhaustion. III 2

Next B star: Vela X-1 Up: B star, giant, naked eye star, spectroscopic binary Previous B star: sdB

Subject	has right ascension	has declination	has spectral type	is part of	has surface temperature	is an instance of	has inclination	has V magnitude	has eccentricity	has color	has been observ	has B-V magnitude	has distance	has absorption line	has abundance	is usually part of	is a kind of	has apparent magnitude	has synonym	has definition	has luminosity class	has number of star
B star			O, B, A, and early F		11000 to 28000 K					blue-white				He I			early star			Blue-white star of spectral type B whose spectra are characterized by absorption lines of neutral helium which reach their maximum intensity at B2. The Balmer lines of hydrogen are strong, and lines of singly ionized oxygen and other gases are also present.
giant					greater than 1000 Kelvin												star			High-luminosity star that lies above the main sequence on the Hertzsprung-Russell diagram.	III
naked eye star				Milky Way	greater than 1000 Kelvin						for many centuries					asterism	naked eye object	brighter than 5		A star visible without visual aids
spectroscopic binary					greater than 1000 Kelvin										half the stars in the solar neighborhood are members of star systems		binary star			Star whose binary nature can be detected from the periodic Doppler shifts of their spectra, owing to their varying velocities in the line of sight. Double-lined spectroscopic binaries have two sets of spectral features, oscillating with opposite phases. Single-lined spectroscopic binaries have only one set of oscillating spectral lines, owing to the dimness of the secondary component. Spectroscopic binaries are typically of spectral type B, with almost circular orbits (whereas long-period M-type binaries have highly eccentric orbits).		2
Spica	13 25 11.5	-11 9 41	B1III-IV+B2V	Milky Way	11000 to 28000 K	naked eye star	i = 65°	0.98	e = 0.146	blue-white	for many centuries	-0.23	80 pc	He I	half the stars in the solar neighborhood are members of star systems	asterism		brighter than 5	HR 5056	A double-lined spectroscopic binary (B1.5 V, late B). Component A (10.9 M_sun) is a beta Cephei star which seems to be near core hydrogen exhaustion.	III	2