56 Cygni

56 Cygni
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 50m 04.93129s[1]
Declination +44° 03′ 33.4862″[1]
Apparent magnitude (V) 5.06[2]
Characteristics
Spectral type A6 V[3]
B−V color index 0.198±0.002[4]
Astrometry
Radial velocity (Rv)−21.5±3.5[2] km/s
Proper motion (μ) RA: +123.450[1] mas/yr
Dec.: +132.420[1] mas/yr
Parallax (π)24.1034 ± 0.1344 mas[1]
Distance135.3 ± 0.8 ly
(41.5 ± 0.2 pc)
Absolute magnitude (MV)2.00[4]
Details[5]
Mass1.72 M☉
Luminosity13.19[4] L☉
Surface gravity (log g)4.28±0.14 cgs
Temperature8,124±276 K
Rotational velocity (v sin i)73[6] km/s
Age394 Myr
Other designations
56 Cyg, BD+43°3739, FK5 3666, HD 198639, HIP 102843, HR 7984, SAO 50121, WDS J20501+4404[7]
Database references
SIMBADdata

56 Cygni is a single[8] star in the northern constellation of Cygnus, located 135[1] light years from Earth. It is visible to the naked eye as a white-hued star with an apparent visual magnitude of 5.06.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −21.5.[2] It has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.181″/yr.[9] According to Eggen (1998), this is a member of the Hyades Supercluster.[10]

This is an A-type main-sequence star with a stellar classification of A6 V.[3] Cowley et al. (1969) classified it as a Delta Delphini star,[11] which is a type of suspected Am star. The star is around 394[5] million years old with a projected rotational velocity of 73 km/s.[6] It has 1.72[5] times the mass of the Sun and is radiating 13[4] times the Sun's luminosity from its photosphere at an effective temperature of 8,124 K.[5]

56 Cygni has a visual companion: a magnitude 11.9 star at an angular separation of 55.4″ along a position angle of 48°, as of 2015.[12]

  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 Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Royer2002 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 Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggen1998 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Mason2001 was invoked but never defined (see the help page).