Astronomy:Qatar-5
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.
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[2] | |
|---|---|
| Discovered by | Alsubai et al. 2019 |
| Discovery date | 2016 |
| Transit | |
| Orbital characteristics | |
| 0.04127 ± 0.00067 au[2] | |
| Eccentricity | 0[2] |
| Orbital period | 2.8792319 d[2] |
| Inclination | 88.74 ± 0.87°[2] |
| Semi-amplitude | 568 ± 15 m/s[2] |
| Physical characteristics | |
| Mean radius | 1.107 ± 0.064 RJ[2] |
| Mass | 4.32 ± 0.18 MJ[2] |
| Mean density | 3.95 ± 0.58 g cm−3[2] |
| Physics | 1415 ± 31 K[2] |
Qatar-5b
Qatar-5b is a Hot Jupiter orbiting the star Qatar-5 located in Andromeda constellation.[3] It orbits its star every 2.87 days. It was discovered in 2016 by the Qatar Exoplanet Survey (QES).[4][2]
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[5]
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.[6] 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.
See also
References
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedWang2021 - ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 Alsubai, Khalid et al. (2017). "Qatar Exoplanet Survey: Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal 153 (4): 200. doi:10.3847/1538-3881/aa6340. Bibcode: 2017AJ....153..200A.
- ↑ "Qatar-5" (in en). 15 September 2018. https://www.universeguide.com/star/qatar5.
- ↑ "Astronomers discover three 'Qatar' exoplanets". http://phys.org/news/2016-06-astronomers-qatar-exoplanets.html.
- ↑ Alsubai, Khalid; Mislis, Dimitris; Tsvetanov, Zlatan I.; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Esquerdo, Gilbert A.; Bramich, D. M. et al. (2017-04-01). "Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal 153 (4): 200. doi:10.3847/1538-3881/aa6340. ISSN 0004-6256. Bibcode: 2017AJ....153..200A.
- ↑ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". https://www.spikevm.com/calculators/conversions/decimal-day-hrs-min-sec.php.
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