27 Vulpeculae

27 Vulpeculae
27 Vulpeculae in the constellation Vulpecula
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 20h 37m 04.6724s[1]
Declination +26° 27′ 43.006″[1]
Apparent magnitude (V) 5.590[2]
Characteristics
Spectral type B9 V[3][4]
B−V color index −0.050±0.004[5]
Astrometry
Radial velocity (Rv)−21.8±4.3[6] km/s
Proper motion (μ) RA: 15.349±0.042[1] mas/yr
Dec.: −11.775±0.040[1] mas/yr
Parallax (π)10.6692 ± 0.0483 mas[1]
Distance306 ± 1 ly
(93.7 ± 0.4 pc)
Absolute magnitude (MV)0.65[5]
Details
Mass2.77±0.03[4] M☉
Radius3.1[7] R☉
Luminosity75.0+4.8
−4.5[4] L☉
Surface gravity (log g)3.781[8] cgs
Temperature10,789+50
−49[4] K
Metallicity [Fe/H]−0.27±0.04[5] dex
Rotational velocity (v sin i)335[4] km/s
Other designations
27 Vul, BD+25° 4302, FK5 3649, HD 196504, HIP 101716, HR 7880, SAO 88903[9]
Database references
SIMBADdata

27 Vulpeculae is a single,[10] blue-white star in the northern constellation of Vulpecula. It is a dim star, visible to the naked eye, with an apparent visual magnitude of 5.59.[2] An annual parallax shift of 10.6692±0.0483 mas[1] provides a distance estimate of about 306 light-years. It is moving closer with a heliocentric radial velocity of −22 km/s,[6] and will make perihelion passage at a distance of around 119 ly (36.56 pc) in 3.75 million years.[5]

This is a B-type main-sequence star with a stellar classification of B9 V.[3] It is spinning rapidly, showing a projected rotational velocity of 335.[4] The star has an estimated 2.77[4] times the mass of the Sun and about 3.1[7] times the Sun's radius. It is radiating 75[4] times the Sun's luminosity from its photosphere at an effective temperature of 10,789 K.[4]

  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 Cite error: The named reference Paunzen2015 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h i Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference cadars2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Huang2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).