| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 28m 24.57s [1] |
| Declination | +08° 21′ 29.0″ [1] |
| Apparent magnitude (V) | 2.07 |
| Characteristics | |
| Spectral type | G2IV |
| B−V color index | 0.678 ± 0.012 |
| Astrometry | |
| Radial velocity (Rv) | -50.7 km/s |
| Proper motion (μ) | RA: -19.08 ± 1.01 [1] mas/yr Dec.: -32.97 ± 0.62 [1] mas/yr |
| Parallax (π) | 18.15 ± 0.93[1] mas |
| Distance | 180 ± 9 ly (55 ± 3 pc) |
| Absolute magnitude (MV) | 8.49 |
| Details | |
| Mass | 1.17 M☉ |
| Radius | 1.21 R☉ |
| Luminosity | 1.58 L☉ |
| Temperature | 5888 K |
| Metallicity | 0.3 % |
| Age | (3.3 ± 2.5) × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| NStED | data |
| Extrasolar Planets Encyclopaedia |
data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
HD 183263 is an 8th magnitude subgiant star located approximately 172 light-years away in the constellation Aquila. This star is about to or already ran out of hydrogen fuel and eventually becomes a red giant and then dies as a white dwarf. It has absolute magnitude (apparent magnitude at 10 pc) of 4.25 compared to the Sun’s 4.83, which indicates the star is more luminous than our Sun, and therefore hotter by 103 K.
The star has two planets. Planet b was discovered in 2005[2] while planet c was discovered in 2008.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | ≥ 3.73 ± 0.31 MJ | 1.508 ± 0.087 | 624.8 ± 1.2 | 0.378 ± 0.011 |
| c | ≥ 3.57 ± 0.55 MJ | 4.35 ± 0.28 | 2070 ± 110 | 0.253 ± 0.076 |