Arcturus Comparison Table

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physical object > naked eye object > naked eye star > Arcturus

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Arcturus comparison table

Subject has right ascension has spectral type has declination is part of has surface temperature is an instance of has V magnitude has color has been observ has B-V magnitude is usually part of is a kind of has apparent magnitude has synonym has definition has luminosity class

bright giant greater than 1000 Kelvin star II

K star cooler than G2 3600 to 5000 K orange to red late star Cool star with spectral type K with spectra resembling those of sunspots, in which the hydrogen lines have been greatly weakened. The HK lines (q.v.) reach their greatest intensity. Strongest lines are Ca I (4227 Å) and the G-band (4303 Å).

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

Arcturus 14 15 39.6 K1IIIbCN-1 +19 10 57 Milky Way 3600 to 5000 K naked eye star -0.04 orange to red for many centuries 1.23 asterism brighter than 5 HR 5340 An old subgiant disk star (K2 IIIp, m_v = 0.06) about 11 pc distant. II

Subject	has right ascension	has spectral type	has declination	is part of	has surface temperature	is an instance of	has V magnitude	has color	has been observ	has B-V magnitude	is usually part of	is a kind of	has apparent magnitude	has synonym	has definition	has luminosity class
bright giant					greater than 1000 Kelvin							star				II
K star		cooler than G2			3600 to 5000 K			orange to red				late star			Cool star with spectral type K with spectra resembling those of sunspots, in which the hydrogen lines have been greatly weakened. The HK lines (q.v.) reach their greatest intensity. Strongest lines are Ca I (4227 Å) and the G-band (4303 Å).
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
Arcturus	14 15 39.6	K1IIIbCN-1	+19 10 57	Milky Way	3600 to 5000 K	naked eye star	-0.04	orange to red	for many centuries	1.23	asterism		brighter than 5	HR 5340	An old subgiant disk star (K2 IIIp, m_v = 0.06) about 11 pc distant.	II

Next bright giant: Beta Trianguli Up: bright giant, K star, naked eye star Previous bright giant: Alpha Trianguli Australis