semiregular variable Comparison Table

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semiregular variable comparison table

Subject has spectral type is an instance of has distance has period is a kind of has image has synonym has definition has luminosity class

Betelgeuse M2 Iab semiregular variable 500 pc alpha Ori A red semiregular variable supergiant. Betelgeuse is also a strong infrared emitter - at 2 µ the brightest in the sky. I

RV Tauri star cooler than G2 1000 days (order of magnitude) semiregular variable A class of about 100 semiregular variable yellow supergiants of late spectral type (G-K), similar to W Virginis stars but with longer periods. Their spectra often contain emission lines, and their light curves have alternating deep and shallow minima. They have a large infrared flux. RVa stars maintain an approximately constant mean brightness; RVb stars have long-term (on the order of 1000 days) periodicity.

Subject	has spectral type	is an instance of	has distance	has period	is a kind of	has image	has synonym	has definition	has luminosity class
Betelgeuse	M2 Iab	semiregular variable	500 pc				alpha Ori	A red semiregular variable supergiant. Betelgeuse is also a strong infrared emitter - at 2 µ the brightest in the sky.	I
RV Tauri star	cooler than G2			1000 days (order of magnitude)	semiregular variable			A class of about 100 semiregular variable yellow supergiants of late spectral type (G-K), similar to W Virginis stars but with longer periods. Their spectra often contain emission lines, and their light curves have alternating deep and shallow minima. They have a large infrared flux. RVa stars maintain an approximately constant mean brightness; RVb stars have long-term (on the order of 1000 days) periodicity.

Next late star: T Tauri star Up: late star, variable Previous late star: S star