23 Cygni

23 Cygni
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 53m 17.37873s[1]
Declination +57° 31′ 24.4810″[1]
Apparent magnitude (V) 5.14[2]
Characteristics
Spectral type B5 V[3]
U−B color index +0.76[2]
B−V color index −0.13[2]
Astrometry
Radial velocity (Rv)−31.6±1.6[4] km/s
Proper motion (μ) RA: +5.768[1] mas/yr
Dec.: +11.483[1] mas/yr
Parallax (π)5.9155 ± 0.1728 mas[1]
Distance550 ± 20 ly
(169 ± 5 pc)
Absolute magnitude (MV)−1.30[5]
Details[2]
Mass4.7+0.64
−0.53[6] M☉
Radius4.30±0.45 R☉
Luminosity611.53[5] L☉
Surface gravity (log g)3.82±0.08 cgs
Temperature14,893±214 K
Metallicity [Fe/H]−0.17±0.16 dex
Rotational velocity (v sin i)145 km/s
Age26+32
−19[6] Myr
Other designations
23 Cyg, BD+57°2084, HD 188665, HIP 97870, HR 7608, SAO 32085, WDS J19533+5731[7]
Database references
SIMBADdata

23 Cygni is a single,[2] blue-white hued star in the northern constellation Cygnus. It is a faint star, visible to the naked eye, with an apparent visual magnitude of 5.14.[2] The distance to this star, as estimated from its annual parallax shift of 5.9 mas,[1] is about 550 light years. It is moving closer to the Earth with a heliocentric radial velocity of −32 km/s,[4] and is expected to come as near as 166 light-years in around 5.6 million years.[2] At that distance, the current star would be of magnitude 2.24.[8]

This is an ordinary B-type main-sequence star of spectral type B5V, a star that is generating energy through hydrogen fusion at its core. It is roughly 26[2] million years old with 4.7[6] times the mass of the Sun and 4.3 times the Sun's radius.[2] The star has a high rate of spin, having a projected rotational velocity of 145 km/s.[2] It is radiating 612[5] times the Sun's luminosity from its photosphere at an effective temperature of 14,893 K.[2]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k Cite error: The named reference Fitzpatrick2005 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Hill1977 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Kraus2016 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference magnitude was invoked but never defined (see the help page).