17 Vulpeculae
Star in the constellation Vulpecula
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17 Vulpeculae is a single,[10] blue-white hued star in the northern constellation of Vulpecula. The distance to this star can be estimated from its annual parallax shift of 6.8168±0.1430,[2] which yields a separation of roughly 480 light years. It is moving nearer with a heliocentric radial velocity of −8 km/s,[4] and will make its closest approach in around 6.1 million years at a distance of about 419 ly (128.36 pc).[1] The star is faintly visible to the naked eye with an apparent visual magnitude of 5.08.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vulpecula[1] |
| Right ascension | 20h 06m 53.4077s[2] |
| Declination | +23° 36′ 51.929″[2] |
| Apparent magnitude (V) | 5.08[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B3 V[3] |
| B−V color index | −0.162±0.002[1] |
| Astrometry | |
| Radial velocity (Rv) | −7.6±0.8[4] km/s |
| Proper motion (μ) | RA: 15.246±0.096[2] mas/yr Dec.: 0.316±0.108[2] mas/yr |
| Parallax (π) | 6.8168±0.1430 mas[2] |
| Distance | 480 ± 10 ly (147 ± 3 pc) |
| Absolute magnitude (MV) | −0.86[1] |
| Details | |
| Mass | 6.1±0.1[5] M☉ |
| Radius | 3.9[6] R☉ |
| Luminosity | 573.30[1] L☉ |
| Temperature | 15,648[7] K |
| Metallicity [Fe/H] | −0.14±0.04[1] dex |
| Rotational velocity (v sin i) | 115[8] km/s |
| Age | 10.7±1.9[5] Myr |
| Other designations | |
| 17 Vul, BD+23° 3896, FK5 3611, HD 190993, HIP 99080, HR 7688, SAO 88212[9] | |
| Database references | |
| SIMBAD | data |
This is an ordinary B-type main-sequence star with a stellar classification of B3 V.[3] It is just 11[5] million years old with a high projected rotational velocity of 115 km/s.[8] The star has an estimated 6.1[5] times the mass of the Sun and around 3.9[6] times the Sun's radius. It is radiating 573[1] times the Sun's luminosity from its photosphere at an effective temperature of 15,648 K.[7]