32 Vulpeculae
Star in the constellation Vulpecula
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32 Vulpeculae is a single[9] star located around 610 light years away from the Sun in the northern constellation Vulpecula,[8] a few degrees south of the border with Cygnus. It is visible to the naked eye as a faint, orange-hued star with a typical apparent visual magnitude of 5.03.[1] This object is drifting further away from the Earth with a heliocentric radial velocity of +6 km/s.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula[1] |
| Right ascension | 20h 54m 33.63918s[2] |
| Declination | +28° 03′ 27.4453″[2] |
| Apparent magnitude (V) | 5.03[1] (4.99–5.06)[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K4 III[4] |
| B−V color index | 1.480[5] |
| Variable type | suspected[3] |
| Astrometry | |
| Radial velocity (Rv) | +5.7±0.6[1] km/s |
| Proper motion (μ) | RA: −3.665±0.099[2] mas/yr Dec.: −1.154±0.109[2] mas/yr |
| Parallax (π) | 5.3203±0.1035 mas[2] |
| Distance | 610 ± 10 ly (188 ± 4 pc) |
| Absolute magnitude (MV) | −1.76[5] |
| Details | |
| Radius | 54.29+1.69 −3.42[6] R☉ |
| Luminosity | 708.4±19.5[6] L☉ |
| Surface gravity (log g) | 1.74[7] cgs |
| Temperature | 4,041+134 −61[6] K |
| Metallicity [Fe/H] | −0.16[7] dex |
| Rotational velocity (v sin i) | 8.1[5] km/s |
| Other designations | |
| 32 Vul, NSV 13398, AAVSO 2050+27, BD+27° 3911, FK5 786, GC 29178, HD 199169, HIP 103200, HR 8008, SAO 89272[8] | |
| Database references | |
| SIMBAD | data |
This is an aging red giant[5] star with a stellar classification of K4 III,[4] having exhausted the supply of hydrogen at its core then expanded to 54[6] times the Sun's radius. It is a suspected variable of unknown type, with a visual magnitude that has been measured ranging from 4.99 down to 5.06.[3] The star is radiating 708[6] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,041 K.[6]