Qatar-5
Star in the constellation Andromeda
From Wikipedia, the free encyclopedia
Qatar-5 is a faint G-dwarf star that hosts a planet in the constellation Andromeda. With an apparent magnitude of 12.82, it is impossible to see with the naked eye, and can be detected with a powerful telescope. Qatar-5 is currently located about 1,211 light years away based on parallax.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 00h 28m 12.94s[2] |
| Declination | +42° 03′ 40.9″[2] |
| Apparent magnitude (V) | 12.82[3] |
| Characteristics | |
| Evolutionary stage | main sequence star[3] |
| Spectral type | G2V[3] |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: 0.919±0.064 mas/yr[2] Dec.: −6.509±0.100 mas/yr[2] |
| Parallax (π) | 2.693±0.058 mas[2] |
| Distance | 1,210 ± 30 ly (371 ± 8 pc) |
| Details | |
| Mass | 1.128±0.056[4] M☉ |
| Radius | 1.076±0.051[4] R☉ |
| Luminosity | 1.13[3] L☉ |
| Surface gravity (log g) | 4.427±0.035[4] cgs |
| Temperature | 5746±49[4] K |
| Metallicity [Fe/H] | 0.38±0.08[4] dex |
| Rotational velocity (v sin i) | 10.4±0.5[3] km/s |
| Age | 530±4[3] Myr |
| Other designations | |
| Gaia DR2 382111248777193216, Qatar 5, 2MASS J00281293+4203407, TOI-1463 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Properties
This star is a relatively young star with an age of only 5.47 billion years. At this age, it is still on the main sequence. Qatar-5 has 112.8% the mass of the Sun, and 107.6% the latter's radius. Despite all of this, it has 113% of the Sun's luminosity, which corresponds to an effective temperature of 5,746 K. Qatar-5 rotates at a rate of 10.4 km/s.
Planetary system
In 2016, the Qatar Exoplanet Survey discovered a planet around this star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.32±0.18 MJ | 0.04127±0.00067 | 2.8792319 | 0 | 88.74±0.87° | 1.107±0.064 RJ |
| Discovery[5] | |
|---|---|
| Discovered by | Alsubai et al. 2019 |
| Discovery date | 2016 |
| Transit | |
| Orbital characteristics | |
| 0.04127 ± 0.00067 au[5] | |
| Eccentricity | 0[5] |
| 2.8792319 d[5] | |
| Inclination | 88.74 ± 0.87°[5] |
| Semi-amplitude | 568 ± 15 m/s[5] |
| Physical characteristics | |
| 1.107 ± 0.064 RJ[5] | |
| Mass | 4.32 ± 0.18 MJ[5] |
Mean density | 3.95 ± 0.58 g cm−3[5] |
| Temperature | 1415 ± 31 K[5] |
Qatar-5b
Qatar-5b is a Hot Jupiter orbiting the star Qatar-5 located in Andromeda constellation.[6] It orbits its star every 2.87 days. It was discovered in 2016 by the Qatar Exoplanet Survey (QES).[7][5]
Discovery
This planet was discovered by QES along with Qatar-3b and Qatar-4b. The light curves of the planet's respective host stars have been observed as well during the survey, along with their stellar properties[8]
Properties
Orbit
This planet is another typical hot Jupiter. It orbits very close to its star with a period of 2 days, 21 hours, 6 minutes, and 5.6 seconds.[9] This corresponds with an orbital distance of 0.04127 AU, which is about 10 times closer to its star than Mercury is to the Sun. With an eccentricity of 0, this suggests that Qatar-5b is on a perfectly circular orbit.
Physical properties
Qatar-5b is a massive planet, with 4.32 times the mass of Jupiter, but a similar radius. With a density of 3.95 g cm−3, this is one of the densest planets discovered. With an effective temperature of 1,415 K, it is a scorching planet.