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Qatar-5b
Discovery
Discovered by	Alsubai et al. 2019
Discovery date	2016
Detection method	Transit
Orbital characteristics
Semi-major axis	0.04127 ± 0.00067 au
Eccentricity	0
Orbital period (sidereal)	2.8792319 d
Inclination	88.74 ± 0.87°
Semi-amplitude	568 ± 15 m/s
Physical characteristics
Mean radius	1.107 ± 0.064 RJ
Mass	4.32 ± 0.18 MJ
Mean density	3.95 ± 0.58 g cm−3
Temperature	1415 ± 31 K

Qatar-5
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Andromeda
Right ascension	00h 28m 13.00s
Declination	+42° 03′ 41.00″
Apparent magnitude (V)	12.82
Characteristics
Evolutionary stage	main sequence star
Spectral type	G5V
Variable type	planetary transit
Astrometry
Proper motion (μ)	RA: 0.919±0.031 mas/yr ; Dec.: −6.509±0.017 mas/yr
Parallax (π)	2.693 ± 0.035 mas
Distance	1,210 ± 20 ly ; (371 ± 5 pc)
Details
Mass	1.128±0.056 M☉
Radius	1.076±0.051 R☉
Luminosity	1.13 L☉
Surface gravity (log g)	4.427±0.035 cgs
Temperature	5746±49 K
Metallicity [Fe/H]	0.38±0.08 dex
Rotational velocity (v sin i)	10.4±0.5 km/s
Age	5.47±0.1 Gyr
Other designations
	Gaia DR2 382111248777193216, Qatar 5, 2MASS J00281293+4203407, TOI-1463
Database references
SIMBAD	data
Exoplanet Archive	data

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 detect with the naked eye, but can be detected with a powerful telescope. Qatar-5 is currently located about 1,211 light years away based on parallax.

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.

The Qatar-5 planetary system^[3]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	4.32±0.18 $M$ _J	0.04127±0.00067	2.8792319	0	88.74±0.87°	1.107±0.064 $R$ _J

Qatar-5b

Qatar-5b is a Hot Jupiter orbiting the star Qatar-5 located in Andromeda constellation.^[5] It orbits its star every 2.87 days. It was discovered in 2016 by the Qatar Exoplanet Survey (QES).^[6]^[4]

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^[7]

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.^[8] 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.

References

^ ^a ^b ^c ^d Gaia Collaboration (2018-04-01). "VizieR Online Data Catalog: Gaia DR2 (Gaia Collaboration, 2018)". VizieR Online Data Catalog. 1345. Bibcode:2018yCat.1345....0G. doi:10.26093/cds/vizier.1345.
^ ^a ^b ^c ^d Alsubai, Khalid; Mislis, Dimitris; Tsvetanov, Zlatan I.; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Esquerdo, Gilbert A.; Bramich, D. M.; Pyrzas, Stylianos; Vilchez, Nicolas P. E.; Mancini, Luigi (2017-04-01). "Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b" (PDF). The Astronomical Journal. 153 (4): 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. ISSN 0004-6256. S2CID 119214858.
^ ^a ^b ^c ^d ^e ^f Wang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves", The Astrophysical Journal Supplement Series, 255 (1): 15, arXiv:2105.14851, Bibcode:2021ApJS..255...15W, doi:10.3847/1538-4365/ac0835, S2CID 235253975
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Alsubai, Khalid; et al. (2017). "Qatar Exoplanet Survey: Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal. 153 (4). 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. S2CID 119214858.
^ "Qatar-5". Universe Guide. 15 September 2018. Retrieved 2019-12-27.
^ "Astronomers discover three 'Qatar' exoplanets".
^ Alsubai, Khalid; Mislis, Dimitris; Tsvetanov, Zlatan I.; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Esquerdo, Gilbert A.; Bramich, D. M.; Pyrzas, Stylianos; Vilchez, Nicolas P. E.; Mancini, Luigi (2017-04-01). "Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal. 153 (4): 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. ISSN 0004-6256.
^ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". www.spikevm.com. Retrieved 2021-03-25.