| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 02m 27.376s[2] |
| Declination | +30° 04′ 25.49″[2] |
| Apparent magnitude (V) | 8.6-9.6[1] |
| Characteristics | |
| Evolutionary stage | Yellow supergiant |
| Spectral type | G7Ia[3] |
| U−B color index | +1.9 – +2.8[1] |
| B−V color index | +2.1 – +2.5[1] |
| Variable type | L[4] |
| Astrometry | |
| Proper motion (μ) | RA: −2.936[2] mas/yr Dec.: −5.55[2] mas/yr |
| Parallax (π) | 0.2390 ± 0.0178 mas[2] |
| Distance | 14,000 ± 1,000 ly (4,200 ± 300 pc) |
| Absolute magnitude (MV) | −7.956[3] |
| Details | |
| Radius | 559[3][a] R☉ |
| Luminosity | 176,200[3] L☉ |
| Surface gravity (log g) | −0.81[5] cgs |
| Temperature | 5,000[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
V1027 Cygni is a luminous yellow supergiant star located in the constellation of Cygnus, about 14,000 light years away. For a time, it was thought that it could be a low-mass post-AGB star, however recent parallax measurements published in Gaia DR3 have shown this to likely not be the case, and instead it is likely a massive yellow supergiant star.[3]
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