Which Variable Star Has the Longest Period?

mishima · Apr 17, 2014

Hi, what is the name of the variable star with the longest period? I know Mira variables are in general the longest, but which particular star has the longest period? Thanks.

CygnusX-1 · Apr 17, 2014

Off the top of my head, I will guess Epsilon Aurigae. It's not a Mira, though.

mishima · Apr 17, 2014

Ah, sorry I meant longest period pulsating variable. One book I have gives 700 days as the upper limit for Miras, another 1000 days.

mishima · Apr 24, 2014

Still looking for this information...failed to find on AAVSO site.

Bill_K · Apr 24, 2014

https://www.eso.org/sci/publications/messenger/archive/no.24-jun81/messenger-no24-24-25.pdf mentions a star with a period of 1630 days.

mishima · Apr 24, 2014

Thank you sir, quite interesting. I suppose very long period variables are somewhat of a practical problem, even more so if in the infrared range.

Which Variable Star Has the Longest Period?

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Which Variable Star Has the Longest Period?

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