17 Delphini
17 Delphini is a solitary star in the equatorial constellation Delphinus. It has an absolute magnitude of −0.64  and apparent magnitude of 5.18, allowing it to be faintly seen with the naked eye. Located 517 light years away, it is approaching the Solar System with a heliocentric radial velocity of . 17 Delphini is an orange giant that is most likely on the horizontal branch (84% probability). At present it has 2.33 times the mass of the Sun, but at an age of 832 million years — has expanded to 23.36 times the radius of the Sun. It shines at  from its enlarged photosphere at an effective temperature of 4,616 K, giving it an orange glow. 17 Del has an iron abundance 64% that of the Sun and spins modestly with a projected rotational velocity of . 17 Del is suspected to be a variable star of unknown type ranging from 5.16 to 5.27. References

Delphinus
K-type giants
Delphini, 17
199253
103294
8011
Suspected variables
BD+13 4572