--- name: RY Sgr constellation: Sgr created_by: 8mag created_date: 2022-01-21 17:00:00 updated_by: skybber updated_date: 2022-02-11 15:39:18.136923 --- similar to R Coronae Borealis, because it suddenly and unexpectedly changes its brightness from eighth to fourteenth magnitude. It has no precise period and is the brightest star of this type after R Coronae Borealis itself. Its brightness drops unexpectedly when carbon soot builds up in the atmosphere.