KY Cygni
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 25m 58.05s[1] |
| Declination | +38° 21′ 07.6″[1] |
| Apparent magnitude (V) | 13.50[2] (13.5 - 15.5)[3] |
| Characteristics | |
| Spectral type | M3-4I[4] |
| B−V color index | 0.12[2] |
| Variable type | LC[3] |
| Astrometry | |
| Distance | ~5,000 ly (1,580[5] pc) |
| Absolute magnitude (MV) | -8.18[4] |
| Details | |
| Radius | 1,420 (2,850?)[4] R☉ |
| Luminosity (bolometric) | 270,000 (1,100,000?)[4] L☉ |
| Surface gravity (log g) | −1.0 (−0.5?)[4] cgs |
| Temperature | 3,500[4] K |
| Other designations | |
|
KY Cyg, AN 339.1929, IRAS 20241+3811, IRC +40415, LEE 220, RAFGL 2575.
|
|
| Database references | |
| SIMBAD | data |
KY Cygni is a red supergiant (spectral class M3.5Ia[3]) located in the constellation Cygnus. It is one of the largest stars known, with an estimated radius of 1,420 times that of the Sun and is also one of the most luminous, with about 300,000 or more times the Sun's luminosity. It is approximately 5,000 light-years away.
See also
File:KY Cygni.gif
Diagram of KY Cygni.
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 KY Cyg, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 12, 2010.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Lua error in package.lua at line 80: module 'strict' not found..
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- http://jumk.de/astronomie/big-stars/ky-cygni.shtml
- http://www.astronomy.com/asy/default.aspx?c=a&id=2772
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