Iota2 Cygni
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 29m 42.36s[1] |
| Declination | +51° 43′ 47.2″[1] |
| Apparent magnitude (V) | 3.77[2] |
| Characteristics | |
| Spectral type | A5V[3] |
| B−V color index | +0.15 [2] |
| Astrometry | |
| Radial velocity (Rv) | -19.50[4] km/s |
| Proper motion (μ) | RA: +20.59[2] mas/yr Dec.: +128.33[2] mas/yr |
| Parallax (π) | 26.88 ± 0.11[1] mas |
| Distance | 121.3 ± 0.5 ly (37.2 ± 0.2 pc) |
| Absolute magnitude (MV) | 0.92 [5] |
| Details | |
| Radius | 1.90 [6] R☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
Iota2 Cygni (ι2 Cyg, often simply called ι Cyg[7]) is a star in the constellation Cygnus. Its apparent magnitude is 3.77[2] Located around 37.20 parsecs (121.3 ly) distant,[1] it is a blue-white main-sequence star of spectral type A5V,[3] a star that is currently fusing its core hydrogen. Based on rapid changes in the strength of a signly-ionized calcium absorption line, the star is likely host to a circumstellar disk.[8]
References
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 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.
- ↑ 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.
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