HD 23474
HD 23474 (HR 1154) is a double star in the southern circumpolar constellation Mensa. It has an apparent magnitude of 6.30, placing it near the max naked eye visibility. The system is situated at a distance of about 750 light years and is currently receding with a heliocentric radial velocity of . As of 2018, the pair have a separation of  along a position angle of . The primary or visible component has a stellar classification of K2 III, indicating that it is a red giant. As a result, it has expanded to a diameter of  and has an effective temperature of , giving an orange hue. It has 121% the mass of the Sun and shines with a luminosity of  from its enlarged photosphere. HD 23474 spins with a poorly constrained projected rotational velocity of  and has a metallicity around solar level. References

Mensa (constellation)
K-type giants
Double stars
Mensae, 3
PD-78 105
023474
016827
1154