27 Vulpeculae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 20h 37m 04.6724s |
| Declination | +26° 27′ 43.006″ |
| Apparent magnitude (V) | 5.590 |
| Characteristics | |
| Spectral type | B9 V |
| B−V color index | −0.050±0.004 |
| Astrometry | |
| Radial velocity (Rv) | −21.8±4.3 km/s |
| Proper motion (μ) | RA: 15.349±0.042 mas/yr Dec.: −11.775±0.040 mas/yr |
| Parallax (π) | 10.6692±0.0483 mas |
| Distance | 306 ± 1 ly (93.7 ± 0.4 pc) |
| Absolute magnitude (MV) | 0.65 |
| Details | |
| Mass | 2.77±0.03 M☉ |
| Radius | 3.1 R☉ |
| Luminosity | 75.0+4.8 −4.5 L☉ |
| Surface gravity (log g) | 3.781 cgs |
| Temperature | 10,789+50 −49 K |
| Metallicity [Fe/H] | −0.27±0.04 dex |
| Rotational velocity (v sin i) | 335 km/s |
| Other designations | |
| 27 Vul, BD+25° 4302, FK5 3649, HD 196504, HIP 101716, HR 7880, SAO 88903 | |
| Database references | |
| SIMBAD | data |
27 Vulpeculae is a single, blue-white star in the northern constellation of Vulpecula. It is a dim star, visible to the naked eye, with an apparent visual magnitude of 5.59. An annual parallax shift of 10.6692±0.0483 mas provides a distance estimate of about 306 light-years. It is moving closer with a heliocentric radial velocity of −22 km/s, and will make perihelion passage at a distance of around 119 ly (36.56 pc) in 3.75 million years.
This is a B-type main-sequence star with a stellar classification of B9 V. It is spinning rapidly, showing a projected rotational velocity of 335. The star has an estimated 2.77 times the mass of the Sun and about 3.1 times the Sun's radius. It is radiating 75 times the Sun's luminosity from its photosphere at an effective temperature of 10,789 K.