Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 20m 53.2482s [1] |
Declination | +59° 26′ 55.575″ [1] |
Apparent magnitude (V) | 13.58 |
Characteristics | |
Spectral type | G/K [2] |
Apparent magnitude (J) | 12.111±0.027 [3] |
Apparent magnitude (H) | 11.673±0.023 [3] |
Apparent magnitude (K) | 11.591±0.019 [3] |
Astrometry | |
Proper motion (μ) |
RA: 9.198(14)
mas/
yr
[1] Dec.: 30.739(13) mas/ yr [1] |
Parallax (π) | 2.7654 ± 0.0115 mas [1] |
Distance | 1,179 ± 5
ly (362 ± 2 pc) |
Details [4] [5] [2] | |
Mass | 0.901±0.029 M☉ |
Radius | 0.851+0.014 −0.013 R☉ |
Surface gravity (log g) | 4.517±0.012 cgs |
Temperature | 5171±36 K |
Metallicity [Fe/H] | 0.20±0.8 dex |
Rotational velocity (v sin i) | 3.80±0.36 km/s |
Age | 7.38±1.87 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
GSC 03949-00967 is a G-type main-sequence star about 1179 light-years away. It is older than the Sun, yet is enriched by heavy elements compared to the Sun, having 160% of solar abundance. [4]
In 2011 a transiting hot Jupiter planet TrES-5b was detected. [4] The host star was one of the faintest stars to which a planetary companion was detected by the transit method at the time of discovery. [2] The planet’s equilibrium temperature is 1480±24 K. [5]
An additional planet on a 4-day orbit in the system was suspected since 2018, [7] but refuted in 2021. Another object on a wide orbit, either star or planet, is still suspected. [8]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.784±0.066 MJ | 0.02447±0.00021 | 1.482247063±0.0000005 | 0.017±0.012 | 84.529±0.005 ° | 1.209±0.021 RJ |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 20m 53.2482s [1] |
Declination | +59° 26′ 55.575″ [1] |
Apparent magnitude (V) | 13.58 |
Characteristics | |
Spectral type | G/K [2] |
Apparent magnitude (J) | 12.111±0.027 [3] |
Apparent magnitude (H) | 11.673±0.023 [3] |
Apparent magnitude (K) | 11.591±0.019 [3] |
Astrometry | |
Proper motion (μ) |
RA: 9.198(14)
mas/
yr
[1] Dec.: 30.739(13) mas/ yr [1] |
Parallax (π) | 2.7654 ± 0.0115 mas [1] |
Distance | 1,179 ± 5
ly (362 ± 2 pc) |
Details [4] [5] [2] | |
Mass | 0.901±0.029 M☉ |
Radius | 0.851+0.014 −0.013 R☉ |
Surface gravity (log g) | 4.517±0.012 cgs |
Temperature | 5171±36 K |
Metallicity [Fe/H] | 0.20±0.8 dex |
Rotational velocity (v sin i) | 3.80±0.36 km/s |
Age | 7.38±1.87 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
GSC 03949-00967 is a G-type main-sequence star about 1179 light-years away. It is older than the Sun, yet is enriched by heavy elements compared to the Sun, having 160% of solar abundance. [4]
In 2011 a transiting hot Jupiter planet TrES-5b was detected. [4] The host star was one of the faintest stars to which a planetary companion was detected by the transit method at the time of discovery. [2] The planet’s equilibrium temperature is 1480±24 K. [5]
An additional planet on a 4-day orbit in the system was suspected since 2018, [7] but refuted in 2021. Another object on a wide orbit, either star or planet, is still suspected. [8]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.784±0.066 MJ | 0.02447±0.00021 | 1.482247063±0.0000005 | 0.017±0.012 | 84.529±0.005 ° | 1.209±0.021 RJ |