Iota1 Cygni

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For other stars with this Bayer designation, see ι Cygni.
Iota1 Cygni
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 27m 25.95887s[1]
Declination 52° 19′ 13.5737″[1]
Apparent magnitude (V) 5.75 [2]
Spectral type A1V [3]
B−V color index +0.00 [2]
Radial velocity (Rv) +1.90[4] km/s
Proper motion (μ) RA: -12.26[2] mas/yr
Dec.: -26.95[2] mas/yr
Parallax (π) 9.30 ± 0.23[1] mas
Distance 351 ± 9 ly
(108 ± 3 pc)
Absolute magnitude (MV) 0.59 [5]
Other designations
7 Cygni, BD+52° 2434, HIP 95656, HR 7408, HD 183534, SAO 31673 [2]
Database references

Iota1 Cygni (ι1 Cyg) is a class A1V[3] (white main-sequence) star in the constellation Cygnus. Its apparent magnitude is 5.75[2] and it is approximately 351 light years away based on parallax.[1]


  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d e f "* iot01 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-04-10. 
  3. ^ a b Jaschek, M. (July 1978), "Catalogue of selected spectral types in the MK system", Bulletin d'Information du Centre de Donnees Stellaires, 15 (121), Bibcode:1978BICDS..15..121J  Vizier catalog entry
  4. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E 
  5. ^ Absolute magnitude calculated as , where is the star's absolute magnitude, is the star's apparent magnitude, and is the star's measured parallax in arcseconds.