24 Vulpeculae

24 Vulpeculae
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 20h 16m 47.0863s[1]
Declination +24° 40′ 15.965″[1]
Apparent magnitude (V) 5.30[2]
Characteristics
Spectral type G8III[2]
B−V color index 0.951[3]
Astrometry
Radial velocity (Rv)+15.3±0.3[4] km/s
Proper motion (μ) RA: 15.128±0.055[1] mas/yr
Dec.: −17.015±0.057[1] mas/yr
Parallax (π)7.9700 ± 0.0674 mas[1]
Distance409 ± 3 ly
(125 ± 1 pc)
Absolute magnitude (MV)−0.68[2]
Details[2]
Mass3.41 M☉
Radius16[5] R☉
Luminosity191 L☉
Surface gravity (log g)2.48 cgs
Temperature4,981 K
Metallicity [Fe/H]−0.06 dex
Rotational velocity (v sin i)5.02[3] km/s
Age251 Myr
Other designations
24 Vul, BD+24° 4075, FK5 760, HD 192944, HIP 99951, HR 7753, SAO 88451[6]
Database references
SIMBADdata

24 Vulpeculae is a single,[7] yellow-hued star in the northern constellation of Vulpecula. It is faintly visible to the naked eye with an apparent visual magnitude of 5.30.[2] The distance to this star can be estimated from its annual parallax shift of 7.9700±0.0674,[1] which yields a separation of roughly 409 light years. It is moving further away with a heliocentric radial velocity of +15 km/s.[4]

This is an evolved giant star with a stellar classification of G8III,[2] having exhausted the hydrogen at its core and moved off the main sequence. It is a red clump giant, indicating it is presently on the horizontal branch and is generating energy through helium fusion in its core region.[8] The interferometry-measured angular diameter of 24 Vul is 1.08±0.02 mas,[9] which, at its estimated distance, equates to a physical radius of about 16 times the radius of the Sun.[5]

24 Vulpeculae is about 251[2] million years old and is spinning with a projected rotational velocity of 5.02 km/s.[3] It has 3.41 times the mass of the Sun and is radiating 191 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,981 K.[2] This is the probable (99.4% chance) source of X-ray emission coming from these coordinates.[10]

  1. ^ a b c d e f Cite error: The named reference Gaia EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Takeda2008 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Hekker2007 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference pulkovo2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Valentini2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Haakonsen2009 was invoked but never defined (see the help page).