| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 19h 43m 42.92539s[1] |
| Declination | +25° 46′ 18.9293″[1] |
| Apparent magnitude (V) | 5.497[2] |
| Characteristics | |
| Spectral type | G8 III[2] |
| B−V color index | 0.923[2] |
| Astrometry | |
| Radial velocity (Rv) | −9.9[2] km/s |
| Proper motion (μ) | RA: +12.01[1] mas/yr Dec.: +21.44[1] mas/yr |
| Parallax (π) | 9.83 ± 0.49 mas[1] |
| Distance | 330 ± 20 ly (102 ± 5 pc) |
| Absolute magnitude (MV) | 0.47[3] |
| Details | |
| Mass | 2.35[2] M☉ |
| Radius | 13[4] R☉ |
| Luminosity | 72[2] L☉ |
| Surface gravity (log g) | 3.08[5] cgs |
| Temperature | 5,008±33[2] K |
| Metallicity [Fe/H] | −0.11[5] dex |
| Age | 1.15[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
10 Vulpeculae is an astrometric binary[7] star system in the northern constellation of Vulpecula. It is faintly visible to the naked eye with an apparent visual magnitude of 5.497.[2] The system is located roughly 330 light years from the Sun, as determined from an annual parallax shift of 9.83±0.49 mas.[1] It is moving closer to the Sun with a heliocentric radial velocity of −9.9 km/s.[2]
The system is a source of X-ray emission.[8] The visible component is an aging giant star with a stellar classification of G8 III.[2] At the age of 1.15 billion years,[2] it has exhausted the hydrogen at its core region and expanded off the main sequence. It is about 13[4] times the Sun's radius and 2.35[2] times the Sun's mass. The star is radiating 72[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,008 K.[2]
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