Mu Cygni
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 21h 44m 08.57793s [1] |
| Declination | 28° 44′ 33.4731″ [1] |
| Apparent magnitude (V) | 4.50 [2] |
| Characteristics | |
| Spectral type | F6V+G2V [3] |
| B−V color index | +0.47 [2] |
| Astrometry | |
| Radial velocity (Rv) | +16.95[4] km/s |
| Proper motion (μ) | RA: +260.72[2] mas/yr Dec.: -243.21[2] mas/yr |
| Parallax (π) | 44.97 ± 0.43[1] mas |
| Distance | 72.5 ± 0.7 ly (22.2 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.76 [5] |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu Cygni is a binary star[6] in the constellation Cygnus. Located around 22.24 parsecs (72.5 ly) distant, the system has a combined apparent magnitude of 4.50.[2] The primary, with an apparent magnitude of 4.69, has a spectral type of F6V,[7] and the secondary, with an apparent magnitude of 6.12, has a spectral type of G2V.[8] Their orbit has a period of around 700 years, with a semimajor axis of 5" and an eccentricity around 0.6.[9] Two reported additional components, C (apparent magnitude 12.93) and D (type A5 and apparent magnitude 6.94), are believed to be optical doubles rather than part of the Mu Cygni system.[3]
References
- ↑ 1.0 1.1 1.2 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 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. - ↑ Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
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