Which Variable Star Has the Longest Period?

AI Thread Summary
The discussion centers on identifying the variable star with the longest period, with an initial focus on Mira variables. While Mira variables typically have periods up to 700 or 1000 days, a source mentions a star with a period of 1630 days. Epsilon Aurigae is noted as a long-period pulsating variable, though it is not a Mira. The conversation highlights the challenges of studying very long period variables, particularly those in the infrared range. Overall, the quest for the longest period variable star continues, emphasizing the complexity of these celestial phenomena.
mishima
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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.
 
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Off the top of my head, I will guess Epsilon Aurigae. It's not a Mira, though.
 
Ah, sorry I meant longest period pulsating variable. One book I have gives 700 days as the upper limit for Miras, another 1000 days.
 
Still looking for this information...failed to find on AAVSO site.
 
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.
 

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