11 Persei
Star in the constellation Perseus
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11 Persei is a single[11][8] star in the constellation of Perseus, located about 418 light years away from the Sun. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.76.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 43m 02.83826s[1] |
| Declination | +55° 06â² 21.6700â³[1] |
| Apparent magnitude (V) | 5.76[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B7 III(p?) (Hg?)[4] |
| BâV color index | â0.110±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | â0.7±1.0[2] km/s |
| Proper motion (μ) | RA: +34.859[1] mas/yr Dec.: â21.955[1] mas/yr |
| Parallax (Ï) | 7.8022±0.0874 mas[1] |
| Distance | 418 ± 5 ly (128 ± 1 pc) |
| Absolute magnitude (MV) | 0.16[2] |
| Details | |
| Mass | 3.77±0.06[3] Mâ |
| Radius | 3.2[5] Râ |
| Luminosity | 210.4+21.9 â19.9[3] Lâ |
| Surface gravity (log g) | 4.19[6] cgs |
| Temperature | 14,550[6] K |
| Metallicity [Fe/H] | +0.09[6] dex |
| Rotation | 25â70 d[7] |
| Rotational velocity (v sin i) | 4.50[8] km/s |
| Age | 50.9±12.2[9] Myr |
| Other designations | |
| 11 Per, BD+54°598, FK5 2188, HD 16727, HIP 12692, HR 785, SAO 23555[10] | |
| Database references | |
| SIMBAD | data |
This is a chemically peculiar mercury-manganese star.[12][6] Cowley (1972) found a stellar classification of B7 III(p?) (Hg?),[4] while Hube (1970) had B8 IV,[13] and Appenzeller (1967) showed B6 V.[14] Stellar models indicate this is a young B-type main sequence star[3] with an estimated age of around 51[9] million years. It has a low rotation rate, showing a projected rotational velocity of 4.50 km/s.[8] The star has 3.8[3] times the mass of the Sun and is radiating 210[3] times the Sun's luminosity from its photosphere at an effective temperature of 14,550 K.[6]