ι Persei, Latinized as Iota Persei, is a single[12] star in the northern constellation Perseus. This object is visible to the naked eye as a faint, yellow-white hued point of light with an apparent visual magnitude of 4.1.[2] It is located 34 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +49 km/s.[5] Iota Persei has a relatively high proper motion across the sky.[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 03h 09m 04.02s[1] |
Declination | +49° 36′ 47.8″[1] |
Apparent magnitude (V) | 4.062[2] |
Characteristics | |
Spectral type | G0V[3] or F9.5 V[4] |
U−B color index | +0.119[2] |
B−V color index | +0.595[2] |
Astrometry | |
Radial velocity (Rv) | +49.22±0.08[5] km/s |
Proper motion (μ) | RA: +1262.41[1] mas/yr Dec.: −91.50[1] mas/yr |
Parallax (π) | 94.87 ± 0.23 mas[1] |
Distance | 34.38 ± 0.08 ly (10.54 ± 0.03 pc) |
Absolute magnitude (MV) | 3.94[6] |
Details | |
Mass | 1.35±0.08[7] M☉ |
Radius | 1.412±0.009[8] R☉ |
Luminosity | 2.181±0.032[8] L☉ |
Surface gravity (log g) | 4.31[7] cgs |
Temperature | 5,963±5.1[9] K |
Metallicity [Fe/H] | +0.09[10] dex |
Rotational velocity (v sin i) | 4.1[7] km/s |
Age | 3.2–4.1[7][10] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is a late F- or early G-type main-sequence star with a stellar classification of around G0V.[3] It is about 3–4[7][10] billion years old and is spinning slowly with a projected rotational velocity of 4 km/s.[7] The star has 1.4[7] times the mass of the Sun and 1.4[8] times the Sun's radius. It is radiating more than double[8] the luminosity of the Sun from its photosphere at an effective temperature of 5,963 K.[9]
There is a 12.4-magnitude line-of-sight companion star that is not believed to be gravitationally associated with Iota Persei.[12] This object is located at an angular separation of 154.4″ from the primary along a position angle of 125°, as of 2014.[13]
In Chinese, 大陵 (Dà Líng), meaning Mausoleum, refers to an asterism consisting of ι Persei, 9 Persei, τ Persei, κ Persei, β Persei, ρ Persei, 16 Persei and 12 Persei. Consequently, the Chinese name for ι Persei itself is 大陵三 (Dà Líng sān, English: the Third Star of Mausoleum).[14]