HR 2131
HR 2131 (HD 41047) is a solitary star in the southern constellation Columba. It has an apparent magnitude of 5.52, allowing it to be faintly seen with the naked eye. The object is located at a distance of 670 light years but is receding with a heliocentric radial velocity of . HR 2131 has a stellar classification of K5 III, indicating that it is a red giant. It has 1.81 times the mass of the Sun and is 2.19 billion years old. The star's high luminosity of  and a low effective temperature of 3,700 K causes it to have an enlarged radius 49 times that of the Sun. HR 2131's metallicity – elements heavier than helium – is around solar level; it spins with a projected rotational velocity of about . References

External Links
Starview/HD 41047

K-type giants
Columba (constellation)
041047
2131
028524
Columbae, 67