--- name: R a TW Hor constellation: Hor created_by: editor.cs created_date: 2023-11-05 15:44:34.059193 updated_by: editor.cs updated_date: 2023-11-05 15:44:34.059197 --- Red giants, long-period variable stars of the Mira Ceti type, whose brightness reaches a maximum of fifth magnitude. R Hor weakens to 14 mag over the course of more than one year, while it takes approximately 5-6 months for the star TW Hor.