| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 19h 52m 04.5427s[1] |
| Declination | +28° 06′ 01.345″[1] |
| Apparent magnitude (V) | 8.24[2] |
| Characteristics | |
| Spectral type | G5IV[3] |
| B−V color index | 0.727±0.010[2] |
| Astrometry | |
| Radial velocity (Rv) | +0.16(12)[1] km/s |
| Proper motion (μ) | RA: 52.809(15) mas/yr[1] Dec.: −92.166(17) mas/yr[1] |
| Parallax (π) | 19.7004 ± 0.0194 mas[1] |
| Distance | 165.6 ± 0.2 ly (50.76 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.47[2] |
| Details | |
| Mass | 1.08±0.02[4] M☉ |
| Radius | 1.21±0.03[4] R☉ |
| Luminosity | 1.41±0.03[4] L☉ |
| Surface gravity (log g) | 4.30±0.03[4] cgs |
| Temperature | 5,726±28[5] K |
| Metallicity [Fe/H] | 0.27±0.02[5] dex |
| Rotational velocity (v sin i) | 5.0[6] km/s |
| Age | 5.9±1.3[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 188015 is a yellow-hued star with an exoplanetary companion in the northern constellation of Vulpecula. It has an apparent visual magnitude of 8.24,[2] making it an 8th magnitude star, and thus is too faint to be readily visible to the naked eye. The distance to this star can be estimated through parallax measurements, which yield a separation of 165.6 light years from the Sun.[1]
This star was assigned a stellar classification of G5IV by J. F. Heard in 1956,[3] matching the spectrum of an evolving G-type subgiant star. This suggests it has ceased or is about to stop hydrogen fusion in its core. The absolute magnitude of 4.47[2] lies just above the main sequence.[8] It is estimated to be six[4] billion years old and is chromospherically quiet with a projected rotational velocity of 5 km/s.[6] The star is almost twice as metal-rich as the Sun. It has 1.1 times the mass and 1.2 times the radius of the Sun. HD 188015 is radiating 1.4[4] times the luminosity of the Sun from its photosphere at an effective temperature of 5,726 km/s.[5]
Gaia DR3 was invoked but never defined (see the help page).Anderson_Francis_2012 was invoked but never defined (see the help page).Heard1956 was invoked but never defined (see the help page).Bonfanti_et_al_2016 was invoked but never defined (see the help page).Sousa_et_al_2018 was invoked but never defined (see the help page).Luck2017 was invoked but never defined (see the help page).Simbad was invoked but never defined (see the help page).Marcy2005 was invoked but never defined (see the help page).