Betelgeuse Comparison Table

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Betelgeuse comparison table

Subject has spectral type is an instance of has optical brightness variation has observational problem has distance has amplitude is a kind of has image has name designated with has observable variation time scale has synonym has definition has luminosity class

red supergiant supergiant A supergiant with spectral type M. Red supergiants are the largest stars in the universe: if put in place of the Sun, some would touch Saturn. The two brightest red supergiants in Earth's sky are Betelgeuse and Antares. I

semiregular variable cooler than G2 0.2 magnitudes or greater some difficulty in distinguishing between various kinds variable late star
R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
V 335, V 336, etc., when the double letter designations are exhausted
within a period of decades A class of giant and supergiant pulsating stars of spectral class M, K, N, R, or S with a periodic (or semiperiodic) light curve of varying amplitude.

Betelgeuse M2 Iab semiregular variable 0.2 magnitudes or greater some difficulty in distinguishing between various kinds 500 pc variable
R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
V 335, V 336, etc., when the double letter designations are exhausted
within a period of decades alpha Ori A red semiregular variable supergiant. Betelgeuse is also a strong infrared emitter - at 2 µ the brightest in the sky. I

Subject	has spectral type	is an instance of	has optical brightness variation	has observational problem	has distance	has amplitude	is a kind of	has image	has name designated with	has observable variation time scale	has synonym	has definition	has luminosity class
red supergiant							supergiant					A supergiant with spectral type M. Red supergiants are the largest stars in the universe: if put in place of the Sun, some would touch Saturn. The two brightest red supergiants in Earth's sky are Betelgeuse and Antares.	I
semiregular variable	cooler than G2		0.2 magnitudes or greater	some difficulty in distinguishing between various kinds		variable	late star		R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades		A class of giant and supergiant pulsating stars of spectral class M, K, N, R, or S with a periodic (or semiperiodic) light curve of varying amplitude.
Betelgeuse	M2 Iab	semiregular variable	0.2 magnitudes or greater	some difficulty in distinguishing between various kinds	500 pc	variable			R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades	alpha Ori	A red semiregular variable supergiant. Betelgeuse is also a strong infrared emitter - at 2 µ the brightest in the sky.	I

Next red supergiant: Antares Up: red supergiant, semiregular variable