HD 92209
HD 92209 (HR 4170) is a probable spectroscopic binary in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.29, placing it near the max naked eye visibility. Parallax measurements place the system at a distance of 600 light years and is currently receding with a heliocentric radial velocity of almost . The visible component has a stellar classification of K2 III, indicating that it is a red giant. As a consequence, it has expanded to 14.39 times the radius of the Sun. Nevertheless, it has 122% the mass of the Sun and shines with a luminosity of , yielding an effective temperature of  from its enlarged photosphere, which in turn gives an orange hue. HD 92209 has a metallicity 115% that of the Sun and spins leisurely with a projected rotational velocity lower than . References

Chamaeleon
K-type giants
Spectroscopic binaries
Chamaeleontis, 22
PD-75 678
092209
051835
4170