4.54
Apparent Mag11,650
Distance (ly)G2Iae
Spectral Type7,260
Temperature (K)Rho Cassiopeiae is one of the most luminous stars in the Milky Way, a yellow hypergiant. It has undergone dramatic eruptions and mass-loss events.
Stellar Data
Apparent Magnitude4.54
Absolute Magnitude-9.5
Distance11,650 light-years
Spectral TypeG2Iae
Temperature7,260 K
Luminosity530,000 L☉
Radius400 R☉
Mass40 M☉
Right Ascension23h 54m 23.0s
Declination+57° 29′ 57.8″
ConstellationCassiopeia
Notable Facts
- Rho Cassiopeiae is one of the most luminous stars in the galaxy
- It ejected a huge amount of mass in an outburst in 2000-2001
- The star cooled by 3000 K during the eruption