red supergiant Comparison Table

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red supergiant comparison table

Subject has right ascension has spectral type has declination is part of is an instance of has optical brightness variation has V magnitude has light curve has observational problem has been observ has location has B-V magnitude has distance is usually part of has amplitude has apparent magnitude has image has name designated with has observable variation time scale has synonym has definition

Antares 16 29 24.4 M1.5Iab-Ib+B4V -26 25 55 Milky Way naked eye star 0.96 for many centuries inner edge of the Orion spiral arm 1.83 125 parsecs asterism brighter than 5 HR 6134 A red M1 Ib supergiant. It has a B3 V companion, which is a radio source.

Betelgeuse M2 Iab semiregular variable 0.2 magnitudes or greater some difficulty in distinguishing between various kinds or center of gravity 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.

Next supergiant: Vela X-1 Up: supergiant Previous supergiant: R Coronae Borealis variable

Subject	has right ascension	has spectral type	has declination	is part of	is an instance of	has optical brightness variation	has V magnitude	has light curve	has observational problem	has been observ	has location	has B-V magnitude	has distance	is usually part of	has amplitude	has apparent magnitude	has image	has name designated with	has observable variation time scale	has synonym	has definition
Antares	16 29 24.4	M1.5Iab-Ib+B4V	-26 25 55	Milky Way	naked eye star		0.96			for many centuries	inner edge of the Orion spiral arm	1.83	125 parsecs	asterism		brighter than 5				HR 6134	A red M1 Ib supergiant. It has a B3 V companion, which is a radio source.
Betelgeuse		M2 Iab			semiregular variable	0.2 magnitudes or greater			some difficulty in distinguishing between various kinds		or center of gravity		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.