32 Vulpeculae

32 Vulpeculae is a single^[8] star located around 610^[1] light years away from the Sun in the northern constellation Vulpecula,^[7] 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.^[2] This object is drifting further away from the Earth with a heliocentric radial velocity of +6 km/s.^[2]

32 Vulpeculae

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Vulpecula
Right ascension	20h 54m 33.63782s[1]
Declination	+28° 03′ 27.4632″[1]
Apparent magnitude (V)	5.03[2] (4.99–5.06)[3]
Characteristics
Evolutionary stage	giant[4]
Spectral type	K4 III[5]
B−V color index	1.480[4]
Variable type	suspected[3]
Astrometry
Radial velocity (Rv)	+5.7±0.6[2] km/s
Proper motion (μ)	RA: −2.525±0.209[1] mas/yr Dec.: −2.277±0.197[1] mas/yr
Parallax (π)	5.3885±0.1260 mas[1]
Distance	610 ± 10 ly (186 ± 4 pc)
Absolute magnitude (MV)	−1.76[4]
Details
Radius	54.29+1.69 −3.42[1] R☉
Luminosity	708.4±19.5[1] L☉
Surface gravity (log g)	1.74[6] cgs
Temperature	4,041+134 −61[1] K
Metallicity [Fe/H]	−0.16[6] dex
Rotational velocity (v sin i)	8.1[4] 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[7]
Database references
SIMBAD	data

This is an aging red giant^[4] star with a stellar classification of K4 III,^[5] having exhausted the supply of hydrogen at its core then expanded to 54^[1] 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^[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,041 K.^[1]