Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pegasus |
Right ascension | 23h 13m 58.7576s [1] |
Declination | 08° 45′ 40.5713″ [1] |
Apparent magnitude (V) | 12.0 |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | K2V [2] |
Astrometry | |
Radial velocity (Rv) | −26.604 [1] km/s |
Proper motion (μ) |
RA: −6.942
[1]
mas/
yr Dec.: −44.330 [1] mas/ yr |
Parallax (π) | 5.7262 ± 0.0134 mas [1] |
Distance | 570 ± 1
ly (174.6 ± 0.4 pc) |
Details [3] | |
Mass | 0.87±0.03 M☉ |
Radius | 0.79±0.02 R☉ |
Surface gravity (log g) | 4.58±0.01 [4] cgs |
Temperature | 5,000±100 K |
Metallicity [Fe/H] | 0.03±0.12 dex |
Rotation | 16±2 d [4] |
Rotational velocity (v sin i) | 1.77+0.19 −0.20 [5] km/s |
Age | 10.7+1.9 −4.5 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-52 is a
K-type main-sequence star about 570
light-years away. It is older than the
Sun at 10.7+1.9
−4.5 billion years, but it has a similar fraction of
heavy elements.
[3]
The
star has prominent
starspot activity, with 3% to 14% of the stellar surface covered by areas 575±150
K cooler than the rest of the photosphere.
[6]
A multiplicity survey in 2015 did not detect any stellar companions. [7] The star was named Anadolu in 2019 by Turkish astronomers as part of the NameExoWorlds contest. [8]
In 2012 a
transiting
hot Jupiter planet,
WASP-52b, was detected in a tight, circular orbit.
[4] The planet was named Göktürk by Turkish astronomers in December 2019.
[8] The planet has a small measured temperature difference between dayside (1481±34
K) and nightside (1224±77
K).
[9] Planetary orbit is well aligned with the equatorial plane of the star, the misalignment being 5.47+4.61
−4.21°.
[5]
Search for transit timing variation did not result in detection of additional planets in system as in 2021. [10]
A transmission spectrum taken in 2020 has revealed the presence of hydrogen, sodium and potassium, [11] although the sodium and potassium lines may be attributable to volcanically active moons of the gas giant, not the planet itself. [12] The atmosphere has no high winds and relatively low-lying clouds, indicating it is not significantly enriched by heavy elements. [13] No signs of the planetary atmosphere escaping to space were detected in 2020, [14] but updated measurement in 2022 showed signs of helium escape, consistent with mass loss rate of 0.5% per billion years. [15]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
WASP-52b (Göktürk) | 0.459+0.022 −0.021 MJ |
0.02713+0.00031 −0.00032 |
1.7497835±0.0000011 | <0.092 | 85.35±0.20 ° | 1.27±0.03 RJ |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pegasus |
Right ascension | 23h 13m 58.7576s [1] |
Declination | 08° 45′ 40.5713″ [1] |
Apparent magnitude (V) | 12.0 |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | K2V [2] |
Astrometry | |
Radial velocity (Rv) | −26.604 [1] km/s |
Proper motion (μ) |
RA: −6.942
[1]
mas/
yr Dec.: −44.330 [1] mas/ yr |
Parallax (π) | 5.7262 ± 0.0134 mas [1] |
Distance | 570 ± 1
ly (174.6 ± 0.4 pc) |
Details [3] | |
Mass | 0.87±0.03 M☉ |
Radius | 0.79±0.02 R☉ |
Surface gravity (log g) | 4.58±0.01 [4] cgs |
Temperature | 5,000±100 K |
Metallicity [Fe/H] | 0.03±0.12 dex |
Rotation | 16±2 d [4] |
Rotational velocity (v sin i) | 1.77+0.19 −0.20 [5] km/s |
Age | 10.7+1.9 −4.5 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-52 is a
K-type main-sequence star about 570
light-years away. It is older than the
Sun at 10.7+1.9
−4.5 billion years, but it has a similar fraction of
heavy elements.
[3]
The
star has prominent
starspot activity, with 3% to 14% of the stellar surface covered by areas 575±150
K cooler than the rest of the photosphere.
[6]
A multiplicity survey in 2015 did not detect any stellar companions. [7] The star was named Anadolu in 2019 by Turkish astronomers as part of the NameExoWorlds contest. [8]
In 2012 a
transiting
hot Jupiter planet,
WASP-52b, was detected in a tight, circular orbit.
[4] The planet was named Göktürk by Turkish astronomers in December 2019.
[8] The planet has a small measured temperature difference between dayside (1481±34
K) and nightside (1224±77
K).
[9] Planetary orbit is well aligned with the equatorial plane of the star, the misalignment being 5.47+4.61
−4.21°.
[5]
Search for transit timing variation did not result in detection of additional planets in system as in 2021. [10]
A transmission spectrum taken in 2020 has revealed the presence of hydrogen, sodium and potassium, [11] although the sodium and potassium lines may be attributable to volcanically active moons of the gas giant, not the planet itself. [12] The atmosphere has no high winds and relatively low-lying clouds, indicating it is not significantly enriched by heavy elements. [13] No signs of the planetary atmosphere escaping to space were detected in 2020, [14] but updated measurement in 2022 showed signs of helium escape, consistent with mass loss rate of 0.5% per billion years. [15]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
WASP-52b (Göktürk) | 0.459+0.022 −0.021 MJ |
0.02713+0.00031 −0.00032 |
1.7497835±0.0000011 | <0.092 | 85.35±0.20 ° | 1.27±0.03 RJ |