33 Vulpeculae

33 Vulpeculae
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 20h 58m 16.34942s[1]
Declination +22° 19′ 33.2638″[1]
Apparent magnitude (V) 5.31[2]
Characteristics
Spectral type K3.5 III[2]
B−V color index 1.419±0.005[3]
Astrometry
Radial velocity (Rv)−25.23±0.24[3] km/s
Proper motion (μ) RA: −2.327[1] mas/yr
Dec.: −4.511[1] mas/yr
Parallax (π)6.5257 ± 0.1689 mas[1]
Distance500 ± 10 ly
(153 ± 4 pc)
Absolute magnitude (MV)−0.41[3]
Details
Radius35.34+1.13
−2.22
[1] R
Luminosity333.7±9.9[1] L
Surface gravity (log g)1.91[4] cgs
Temperature4,070[4] K
Metallicity [Fe/H]−0.12[4] dex
Other designations
33 Vul, BD+21° 4424, FK5 1549, HD 199697, HIP 103511, HR 8032, SAO 89332[5]
Database references
SIMBADdata

33 Vulpeculae is a single[6] star located around 500 light-years away from the Sun in the northern constellation of Vulpecula. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.31.[2] The object is drifting closer to the Earth with a heliocentric radial velocity of −25 km/s.[3]

This is an evolved giant star with a stellar classification of K3.5 III,[2] having exhausted the supply of hydrogen at it its core and expanded to 35[1] times the Sun's radius. It serves as a spectral standard for stars of its particular class.[7] This star is radiating 334[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,070 K.[4]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Soubiran2010 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Keenan1988 was invoked but never defined (see the help page).