Pi Persei
Template:Location mark Location of π Persei (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.70[2] |
| Characteristics | |
| Spectral type | A2Vn[3] |
| U−B Template:Engvar | +0.12[2] |
| B−V Template:Engvar | +0.06[2] |
| Astrometry | |
| Radial velocity (Rv) | +14.2[4] km/s |
| Proper motion (μ) | RA: +26.224[1] mas/yr Dec.: −41.899[1] mas/yr |
| Parallax (π) | 10.7797±0.2794 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.21[5] |
| Details | |
| Mass | 2.07[6] Template:Solar mass |
| Radius | 4.8[7] Template:Solar radius |
| Luminosity | 170[8] Template:Solar luminosity |
| Surface gravity (log g) | 3.53[6] cgs |
| Temperature | 9,290[8] K |
| Rotational velocity (v sin i) | 186[8] km/s |
| Age | 272[6] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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π Persei, Latinized as Pi Persei, is a single[10] star in the northern constellation of Perseus. It has the traditional name Gorgonea Secunda Template:IPAc-en, the second of three Gorgons in the mythology of the hero Perseus.[11] This star has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.7.[2] It is located at a distance of approximately 303 light years from the Sun based on parallax,[1] and is moving further away with a radial velocity of +14 km/s.[4]
This object is an A-type main-sequence star with a stellar classification of A2Vn,[3] where the 'n' suffix indicates broad (nebulous) lines due to rapid rotation. It is spinning with a projected rotational velocity of 186 km/s,[8] which is creating an equatorial bulge that is 6% wider than the polar radius.[12] The star is 272[6] million years old with double the mass of the Sun.[6] It has 4.8[7] times the Sun's radius and is radiating 170[8] times the luminosity of the Sun from its photosphere at an effective temperature of 9,290 K.[8]
References
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- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b c d e Script error: No such module "Citation/CS1". Vizier catalog entry
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- ↑ a b c d e f Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ Template:Cite simbad
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