Iota1 Cygni

Iota¹ Cygni

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus
Right ascension	19^h 27^m 25.95887^s [1]
Declination	52° 19′ 13.5737″ [1]
Apparent magnitude (V)	5.75 [2]
Characteristics
Spectral type	A1V [3]
B−V color index	+0.00 [2]
Astrometry
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, GC 26893, HIP 95656, HR 7408, HD 183534, SAO 31673 [2]
Database references
SIMBAD	data

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]

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
2. "Iota1 Cygni". SIMBAD Astronomical Database. Retrieved 2016-04-10.
3. 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 $M = m + 5 (1 + \log_{10}{p})\!\,$, where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.