HD 220074
A red giant with one of the first exoplanets found around such a star.
HD 220074 is a red giant star in Cassiopeia, near the Cepheus border. It appears reddish and is faintly visible without a telescope at magnitude +6.39. This star, now known to be the largest star with a confirmed exoplanet, has expanded after exhausting its core hydrogen.
Quick Facts
- Constellation
- Cassiopeia
- Apparent magnitude
- +6.39
- Distance
- approximately 1,082 light years
- Radial velocity
- −37 km/s
- Stellar classification
- M2III
- Mass
- ~1.2 times the mass of the Sun
- Radius
- 60 times the Sun's radius
Facts from the source article.
Planetary system
From September 2008 to June 2012, B.-C. Lee, I. Han, and M.-G. Park observed HD 220074 using the BOES spectrograph at Bohyunsan Optical Astronomy Observatory. In 2012, radial velocity measurements revealed a long-period, wide-orbiting eccentric planet, designated HD 220074 b. Along with HD 208527 b, it is one of the first two candidate planets found orbiting red giants.
More in Stars of Cassiopeia
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced