29 Cygni
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 14m 32.03235s[2] |
| Declination | +36° 48′ 22.7009″[2] |
| Apparent magnitude (V) | 4.94 - 4.97[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4][5] |
| Spectral type | A2 V[6] |
| B−V color index | 0.151±0.018[7] |
| Variable type | δ Sct[8] |
| Absolute magnitude (MV) | 1.78[7] |
| Details | |
Myr | |
| Database references | |
| SIMBAD | data |
29 Cygni is a singleArgus Association of co-moving stars.[11]
This is an
29 Cygni is listed in
′, including the yellow 7th magnitude HD 192661. All are background objects not physically associated with 29 Cygni itself.[15][16] The naked-eye stars b1 Cygni and b2 Cygni
, respectively about one and two degrees away, also lie at different distances to 29 Cygni.
Planetary system
In 2022, a superjovian extrasolar planet HIP 99770 b was discovered by direct imaging and astrometry. Its spectral class is between L7 and L9.5, corresponding to a surface temperature of 1400±100 K.[17]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 13.9+6.1 −5.1 MJ |
16.9+3.4 −1.9 |
11900+3800 −1200 |
0.25+0.14 −0.16 |
148+13 −11° |
1 RJ |
Notes
- ^ Radius calculated with temperature and luminosity
References
- doi:10.1086/112023.
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- Bibcode:2009yCat....102025S.
- ^ S2CID 55586789, A120.
- ^ S2CID 120924176
- ^ doi:10.1086/110819.
- ^ S2CID 119257644.
- ^ hdl:10261/226673.
- ^ S2CID 88503488.
- ^ "29 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-01-13.
- S2CID 118497872, 88.
- S2CID 59405545, e036
- doi:10.1086/521434.
- S2CID 14184105.
- doi:10.1086/323920.
- S2CID 244398875.
- ^ PMID 37053312