czsky/en/star/V_Hya.md

name	constellation	created_by	created_date	updated_by	updated_date
V Hya	Hya	8mag	2022-01-21 17:00:00	skybber	2022-02-06 11:45:17.219413

a rare example of a carbon star. It's a low-temperature red giant that produces carbon. The star is very red, so it can't be mistaken for any other star. But it has one catch: it changes its brightness irregularly between 6th and 12th mag in two main periods - 18 months and 18 years.