--- name: V Hya constellation: Hya created_by: 8mag created_date: 2022-01-21 17:00:00 updated_by: skybber updated_date: 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.