Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 20h 12m 40.1692s [1] |
Declination | −02° 08′ 39.1912″ [1] |
Apparent magnitude (V) | 11.939 |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | K7[ citation needed] |
Astrometry | |
Radial velocity (Rv) | 9.82±0.77 [2] km/s |
Proper motion (μ) |
RA: -132.913
[2]
mas/
yr Dec.: -50.683 [2] mas/ yr |
Parallax (π) | 20.1141 ± 0.0207 mas [2] |
Distance | 162.2 ± 0.2
ly (49.72 ± 0.05 pc) |
Details | |
Mass | 0.614+0.014 −0.012 [3] M☉ |
Radius | 0.586+0.017 −0.018 [4] R☉ |
Surface gravity (log g) | 4.60±0.02 [5] cgs |
Temperature | 4066±22 [5] K |
Metallicity [Fe/H] | 0.13±0.11 [6] dex |
Rotation | 23.5±3 [7] |
Rotational velocity (v sin i) | 5.04±0.19 [5] km/s |
Age | 1.352±0.222 [7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years. [7] WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain. [6]
The star was named Petra in 2019 by Jordanian amateur astronomers as part of the NameExoWorlds contest. [8]
Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉ companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%. [9]
In 2013 a transiting hot Jupiter planet WASP-80 b was detected on a tight, circular orbit. [10] The planet was named Wadirum by Jordanian astronomers in December 2019. [8] Its equilibrium temperature is 825±19 K, while measured temperature of the dayside is 937±48 K and temperature of the nightside is 851±14 K. This temperature difference indicates a rather low planetary albedo and weak global transport of heat. [11]
Measurement of the Rossiter–McLaughlin effect in 2015 revealed WASP-80b's is orbit is well-aligned with the equatorial plane of the star, with orbital obliquity equal to 14±14°. [4]
Although one transmission spectrum of the planetary atmosphere showed signs of ionised potassium, [12] another measurement in 2017 yielded a gray and featureless spectrum, probably due to a high cloud deck [13] or haze [14] in the atmosphere of WASP-80b. [11] The James Webb Space Telescope has characterized the atmospheric composition of WASP-80 b, detecting signs of water vapor and methane on the planet. [15] This discovery not only uncovers the exoplanet's origin and evolution but also fosters a comparative study bridging our solar system's gas giants and diverse exoplanets. [16]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (Wadirum) | 0.571±0.02 [3] MJ | 0.0344+0.0011 −0.0010 [4] |
3.067852 [4] | 0 [4] | 89.02+0.11 −0.10 [4] ° |
1.0091+0.011 −0.0095 [3] RJ |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 20h 12m 40.1692s [1] |
Declination | −02° 08′ 39.1912″ [1] |
Apparent magnitude (V) | 11.939 |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | K7[ citation needed] |
Astrometry | |
Radial velocity (Rv) | 9.82±0.77 [2] km/s |
Proper motion (μ) |
RA: -132.913
[2]
mas/
yr Dec.: -50.683 [2] mas/ yr |
Parallax (π) | 20.1141 ± 0.0207 mas [2] |
Distance | 162.2 ± 0.2
ly (49.72 ± 0.05 pc) |
Details | |
Mass | 0.614+0.014 −0.012 [3] M☉ |
Radius | 0.586+0.017 −0.018 [4] R☉ |
Surface gravity (log g) | 4.60±0.02 [5] cgs |
Temperature | 4066±22 [5] K |
Metallicity [Fe/H] | 0.13±0.11 [6] dex |
Rotation | 23.5±3 [7] |
Rotational velocity (v sin i) | 5.04±0.19 [5] km/s |
Age | 1.352±0.222 [7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years. [7] WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain. [6]
The star was named Petra in 2019 by Jordanian amateur astronomers as part of the NameExoWorlds contest. [8]
Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉ companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%. [9]
In 2013 a transiting hot Jupiter planet WASP-80 b was detected on a tight, circular orbit. [10] The planet was named Wadirum by Jordanian astronomers in December 2019. [8] Its equilibrium temperature is 825±19 K, while measured temperature of the dayside is 937±48 K and temperature of the nightside is 851±14 K. This temperature difference indicates a rather low planetary albedo and weak global transport of heat. [11]
Measurement of the Rossiter–McLaughlin effect in 2015 revealed WASP-80b's is orbit is well-aligned with the equatorial plane of the star, with orbital obliquity equal to 14±14°. [4]
Although one transmission spectrum of the planetary atmosphere showed signs of ionised potassium, [12] another measurement in 2017 yielded a gray and featureless spectrum, probably due to a high cloud deck [13] or haze [14] in the atmosphere of WASP-80b. [11] The James Webb Space Telescope has characterized the atmospheric composition of WASP-80 b, detecting signs of water vapor and methane on the planet. [15] This discovery not only uncovers the exoplanet's origin and evolution but also fosters a comparative study bridging our solar system's gas giants and diverse exoplanets. [16]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (Wadirum) | 0.571±0.02 [3] MJ | 0.0344+0.0011 −0.0010 [4] |
3.067852 [4] | 0 [4] | 89.02+0.11 −0.10 [4] ° |
1.0091+0.011 −0.0095 [3] RJ |