Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 21h 00m 06.19682s [1] |
Declination | −05° 05′ 40.0349″ [1] |
Apparent magnitude (V) | 9.87±0.03 [2] |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | K5V [3] |
Astrometry | |
Radial velocity (Rv) | −9.83±0.13 [1] km/s |
Proper motion (μ) |
RA: 33.778
mas/
yr
[1] Dec.: −93.581 mas/ yr [1] |
Parallax (π) | 19.8858 ± 0.0170 mas [1] |
Distance | 164.0 ± 0.1
ly (50.29 ± 0.04 pc) |
Details | |
Mass | 0.826±0.029 [2] M☉ |
Radius | 0.813 [2] R☉ |
Surface gravity (log g) | 4.59±0.02 [4] cgs |
Temperature | 4782±15 [4] K |
Metallicity [Fe/H] | 0.10±0.01 [4] dex |
Rotation | 23.07 d [2] |
Rotational velocity (v sin i) | 1.27±0.22 [4] km/s |
Age | 2 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-69, also named Wouri, is a K-type main-sequence star 164 light-years (50 parsecs) away. [6] Its surface temperature is 4782±15 K. WASP-69 is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.10±0.01, [4] and is much younger than the Sun at 2 billion years. The data regarding starspot activity of WASP-69 are inconclusive, but spot coverage of the photosphere may be very high. [7]
Multiplicity surveys did not detect any stellar companions to WASP-69 as of 2020. [8]
The designation WASP-69 indicates that this was the 69th star found to have a planet by the Wide Angle Search for Planets.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [9] The approved names, proposed by a team from Cameroon, were announced in June 2023. WASP-69 is named Wouri and its planet is named Makombé, after the Wouri and Makombé rivers. [10]
In 2013, one planet, named WASP-69b, [6] was discovered on a tight, circular orbit. [2] Its equilibrium temperature is 886 K, [11] but the measured terminator temperature is significantly higher by at least 200 K. [7] The planet is losing mass at a moderate rate of 0.5 ME per billion years, not producing a visible cometary tail, [11] although it was detected in 2024 and measured to be at least 7 times its own radius. [12]
The planetary atmosphere is extremely hazy and contains a partial cloud deck with cloud tops rising to a pressure of 100 Pa. Its composition is mostly hydrogen and helium, and sodium was also detected in low concentration. [7] [13] The sodium may originate from volcanic moons, not from the planet itself. [14]
By 2021, the presence of hazes in atmosphere of WASP-69b was confirmed, along with a solar or super-solar water abundance. [15]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Makombé | 0.260±0.017 MJ | 0.04525±0.00053 | 3.8681382±0.0000017 | 0 | 86.71±0.20 ° | 0.945+0.007 −0.017 [7] RJ |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 21h 00m 06.19682s [1] |
Declination | −05° 05′ 40.0349″ [1] |
Apparent magnitude (V) | 9.87±0.03 [2] |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | K5V [3] |
Astrometry | |
Radial velocity (Rv) | −9.83±0.13 [1] km/s |
Proper motion (μ) |
RA: 33.778
mas/
yr
[1] Dec.: −93.581 mas/ yr [1] |
Parallax (π) | 19.8858 ± 0.0170 mas [1] |
Distance | 164.0 ± 0.1
ly (50.29 ± 0.04 pc) |
Details | |
Mass | 0.826±0.029 [2] M☉ |
Radius | 0.813 [2] R☉ |
Surface gravity (log g) | 4.59±0.02 [4] cgs |
Temperature | 4782±15 [4] K |
Metallicity [Fe/H] | 0.10±0.01 [4] dex |
Rotation | 23.07 d [2] |
Rotational velocity (v sin i) | 1.27±0.22 [4] km/s |
Age | 2 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-69, also named Wouri, is a K-type main-sequence star 164 light-years (50 parsecs) away. [6] Its surface temperature is 4782±15 K. WASP-69 is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.10±0.01, [4] and is much younger than the Sun at 2 billion years. The data regarding starspot activity of WASP-69 are inconclusive, but spot coverage of the photosphere may be very high. [7]
Multiplicity surveys did not detect any stellar companions to WASP-69 as of 2020. [8]
The designation WASP-69 indicates that this was the 69th star found to have a planet by the Wide Angle Search for Planets.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [9] The approved names, proposed by a team from Cameroon, were announced in June 2023. WASP-69 is named Wouri and its planet is named Makombé, after the Wouri and Makombé rivers. [10]
In 2013, one planet, named WASP-69b, [6] was discovered on a tight, circular orbit. [2] Its equilibrium temperature is 886 K, [11] but the measured terminator temperature is significantly higher by at least 200 K. [7] The planet is losing mass at a moderate rate of 0.5 ME per billion years, not producing a visible cometary tail, [11] although it was detected in 2024 and measured to be at least 7 times its own radius. [12]
The planetary atmosphere is extremely hazy and contains a partial cloud deck with cloud tops rising to a pressure of 100 Pa. Its composition is mostly hydrogen and helium, and sodium was also detected in low concentration. [7] [13] The sodium may originate from volcanic moons, not from the planet itself. [14]
By 2021, the presence of hazes in atmosphere of WASP-69b was confirmed, along with a solar or super-solar water abundance. [15]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Makombé | 0.260±0.017 MJ | 0.04525±0.00053 | 3.8681382±0.0000017 | 0 | 86.71±0.20 ° | 0.945+0.007 −0.017 [7] RJ |