Iota Capricorni

Stellar classification



  • X -83
  • Y -130
  • Z 122
→ Sol: 197

Object type

  • Variable of BY Dra type
  • Star
  • Infra-Red source
  • UV-emission source
  • Variable Star
  • X-ray source
simbad:* iot Cap


Iota Capricorni (ι Cap, ι Capricorni) is a solitary, yellow-hued star in the southern constellation of Capricornus. It can be seen with the naked eye, having an apparent visual magnitude of +4.3. Based upon an annual parallax shift of 16.58 mas as seen from the Earth, the star is located about 197 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.08 due to interstellar dust.

This is an evolved G-type giant star with a stellar classification of G8 III. It is classified as a BY Draconis type variable star. This is a chromospherically-active star with a longitudinal magnetic field strength of 8.3±0.6 G and an X-ray luminosity of 4.482×1030 erg s−1. The activity and photometric variation of the star allow an estimate of its rotation period as 68 days.

Iota Capricorni has an estimated 2.9 times the mass of the Sun and nearly 11 times the Solar radius. It is 390 million years old and is radiating 83 times the solar luminosity from its chromosphere at an effective temperature of 5,200 K.

This article uses material from the Wikipedia article "Iota Capricorni", which is released under the Creative Commons Attribution-Share-Alike License 3.0.