19 Vulpeculae

19 Vulpeculae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vulpecula
Right ascension 20h 11m 47.9738s[1]
Declination 26° 48′ 32.3736″[1]
Apparent magnitude (V) 5.40[2]
Characteristics
Spectral type K2 IIIa[3]
B−V color index 1.40[4]
Astrometry
Radial velocity (Rv)−19.33±0.11[4] km/s
Proper motion (μ) RA: 1.619±0.119[1] mas/yr
Dec.: −10.600±0.122[1] mas/yr
Parallax (π)1.9328 ± 0.0779 mas[1]
Distance1,690 ± 70 ly
(520 ± 20 pc)
Absolute magnitude (MV)−2.60[5]
Details
Mass4.94±0.53[6] M☉
Radius100.3+1.7
−3.0[1] R☉
Luminosity2,889±145[1] L☉
Surface gravity (log g)1.40[7] cgs
Temperature4,200[7] K
Metallicity [Fe/H]−0.01[7] dex
Rotational velocity (v sin i)< 3.4[8] km/s
Other designations
19 Vul, BD+26° 3825, HD 192004, HIP 99518, HR 7718, SAO 88330[9]
Database references
SIMBADdata

19 Vulpeculae is star located approximately 1,690[1] light years from Earth in the northern constellation of Vulpecula.[9] It is a probable member of the open cluster NGC 6882.[4] This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.40.[2] It is moving closer to the Earth with a heliocentric radial velocity of −19 km/s.[4]

This is an aging giant star with a stellar classification of K2 IIIa,[3] having already consumed the hydrogen at its core and evolved away from the main sequence. It has nearly five[6] times the mass of the Sun but has expanded to around 100[1] times the Sun's radius. The star is radiating 2,889[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,200 K.[7]

  1. ^ a b c d e f g h i j Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference fernie was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Mermilliod2008 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Luck1994 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DeMedeiros2000 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Simbad was invoked but never defined (see the help page).