Sirius Comparison Table

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Sirius comparison table

Subject has right ascension has declination has spectral type is part of has surface temperature is an instance of has V magnitude has been observ has color has symbol 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

A star O, B, A, and early F 10000 K white H I early star Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are present; in late A stars the H and K lines of ionized calcium appear. A0 stars have a color index of zero.

binary star greater than 1000 Kelvin half the stars in the solar neighborhood are members of star systems star system A system of two stars orbiting around a common center of gravity. Visual binaries are those whose components can be resolved telescopically (i.e., angular separation > 0'.5) and which have detectable orbital motion. Astrometric binaries are those whose dual nature can be deduced from their variable proper motion; spectroscopic binaries, those whose dual nature can be deduced from their variable radial velocity. At least half of the stars in the solar neighborhood are members of binary (or multiple) systems. (See photometric binaries; optical pairs.) 2

dwarf greater than 1000 Kelvin d star main sequence star Star with mass equal to or less than that of the sun. More generally, any star on or below the main sequence in the Hertzprung-Russell diagram. V

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

Sirius 6 45 8.9 -16 42 58 A1Vm Milky Way 10000 K binary star -1.46 for many centuries white d 0.00 8.6 light-years H I half the stars in the solar neighborhood are members of star systems asterism brighter than 5 HR 2491 The brightest star in the sky. Its companion (Sirius B) is a white dwarf of about 0.96 M_sun but only about 0.03 R_sun, the nearest white dwarf to Earth. V 2

Next A star: Vega Up: A star, binary star, dwarf, naked eye star Previous A star: Magnetic star

Subject	has right ascension	has declination	has spectral type	is part of	has surface temperature	is an instance of	has V magnitude	has been observ	has color	has symbol	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
A star			O, B, A, and early F		10000 K				white				H I			early star			Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are present; in late A stars the H and K lines of ionized calcium appear. A0 stars have a color index of zero.
binary star					greater than 1000 Kelvin									half the stars in the solar neighborhood are members of star systems		star system			A system of two stars orbiting around a common center of gravity. Visual binaries are those whose components can be resolved telescopically (i.e., angular separation > 0'.5) and which have detectable orbital motion. Astrometric binaries are those whose dual nature can be deduced from their variable proper motion; spectroscopic binaries, those whose dual nature can be deduced from their variable radial velocity. At least half of the stars in the solar neighborhood are members of binary (or multiple) systems. (See photometric binaries; optical pairs.)		2
dwarf					greater than 1000 Kelvin					d						star		main sequence star	Star with mass equal to or less than that of the sun. More generally, any star on or below the main sequence in the Hertzprung-Russell diagram.	V
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
Sirius	6 45 8.9	-16 42 58	A1Vm	Milky Way	10000 K	binary star	-1.46	for many centuries	white	d	0.00	8.6 light-years	H I	half the stars in the solar neighborhood are members of star systems	asterism		brighter than 5	HR 2491	The brightest star in the sky. Its companion (Sirius B) is a white dwarf of about 0.96 M_sun but only about 0.03 R_sun, the nearest white dwarf to Earth.	V	2