30 Cygni

30 Cygni

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus
Right ascension	20^h 13^m 18.05358^s [1]
Declination	46° 48′ 56.4424″ [1]
Apparent magnitude (V)	4.83 [2]
Characteristics
Spectral type	A5IIIn [3]
B−V color index	+0.09 [2]
Astrometry
Radial velocity (Rv)	-26.00[4] km/s
Proper motion (μ)	RA: +13.83[2] mas/yr Dec.: +3.00[2] mas/yr
Parallax (π)	5.34 ± 0.33[1] mas
Distance	610 ± 40 ly (190 ± 10 pc)
Absolute magnitude (MV)	-1.53 [5]
Details
Radius	1.40 [6] R☉
Other designations
CCDM J20135+4646D, GC 28091, HIP 99639, HR 7730, HD 192514, SAO 49332, WDS J20136+4644D [2]
Database references
SIMBAD	data

30 Cygni is a class A5III^[3] (white giant) star in the constellation Cygnus. Its apparent magnitude is 4.83^[2] and it is approximately 610 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. "30 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. Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten 328 (9): 889, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776
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.
6. Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451 Vizier catalog entry