17 Persei
Star in the constellation Perseus
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17 Persei is a single[11] star in the northern constellation of Perseus, located about 420 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.53.[2] This object is moving further from the Earth at a heliocentric radial velocity of +13 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 51m 30.83735s[1] |
| Declination | 35° 03â² 35.0629â³[1] |
| Apparent magnitude (V) | 4.53[2] |
| Characteristics | |
| Spectral type | K5+III[3] |
| UâB color index | +1.92[2] |
| BâV color index | +1.57[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | +13.21[5] km/s |
| Proper motion (μ) | RA: +9.479 mas/yr[1] Dec.: â62.744 mas/yr[1] |
| Parallax (Ï) | 7.7762±0.2018 mas[1] |
| Distance | 420 ± 10 ly (129 ± 3 pc) |
| Absolute magnitude (MV) | â1.21[6] |
| Details | |
| Mass | 1.10±0.09[7] Mâ |
| Radius | 60.16+3.58 â4.06[8] Râ |
| Luminosity | 848±115[8] Lâ |
| Surface gravity (log g) | 0.93±0.06[7] cgs |
| Temperature | 4,014±51[8] K |
| Metallicity [Fe/H] | â0.26[6] dex |
| Rotational velocity (v sin i) | 1.6[9] km/s |
| Other designations | |
| NSV 963, BD+34°527, FK5 2198, GC 3419, HD 17709, HIP 13328, HR 843, SAO 55946[10] | |
| Database references | |
| SIMBAD | data |
Based upon a stellar classification of K5+III,[3] this is an evolved giant star that has exhausted the hydrogen at its core. It is a suspected variable star, with an amplitude of 0.012 magnitude and period 4.4 days.[4][12] The star has 1.1 times the mass of the Sun[7] and has expanded to 60 times the Sun's radius. It is radiating 848 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,014 K.[8]