czsky/en/star/hr90.md

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---
name: R Andromedae
constellation: And
created_by: 8mag
created_date: 2022-01-21 17:00:00
updated_by: skybber
updated_date: 2022-01-21 17:08:18.291883
---
A long-period variable star of the type Mira Ceti, the brightest in this constellation. It lies near a small triangle of stars θ, σ and ρ And. At its maximum of 5.8mag it is at the limit of naked-eye visibility, but in 409.33 days its brightness drops to 14.9mag (changing by 9 magnitudes) and is virtually unobservable with smaller amateur telescopes. The distance is not precisely determined, about 790 light years.