Qatar-3

Short description: Star in the constellation Andromeda

Qatar-3  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Andromeda
Right ascension |  23h 56m 36.48312s[1]
Declination | 36° 12′ 46.7739″[1]
Apparent magnitude (V) | 12.88[2]
Characteristics
Evolutionary stage | main sequence
Spectral type | G0V[2]
Variable type | planetary transit
Astrometry
Radial velocity (Rv)| 10.99±3.31[1] km/s
Proper motion (μ)|  RA: −17.763[1] mas/yr
Dec.: −8.484[1] mas/yr
Parallax (π)| 1.3316 ± 0.0588[1] mas
Distance| 2,400 ± 100 ly
(750 ± 30 pc)
Absolute magnitude (MV)| 3.50
Details[2]
Mass| 1.145±0.064 M☉
Radius| 1.272±0.14 R☉
Luminosity| 1.90±0.46 L☉
Surface gravity (log g)| 4.28±0.05 cgs
Temperature| 5,991±64 K
Metallicity [Fe/H]| −0.041±0.081 dex
Rotation| 6.31
Rotational velocity (v sin i)| 10.4±0.5 km/s
Age| 310±1 Myr
Other designations

Gaia DR2 2878641361300809856[3]

Database references

Qatar-3 is a 12th magnitude star located in the northern constellation Andromeda. It is host to a transiting planet.[2] With a radial velocity of 10.99 km/s, it is drifting away from the Solar System, and is currently located 2,400 light years away based on its annual parallax.

## Contents

* 1 Properties
* 2 Planetary system
* 2.1 Orbit
* 2.2 Physical properties
* 3 References

## Properties

This star is a hot yellow dwarf with 14.5% more mass than the Sun, and 27.2% larger. It has a luminosity of almost two times that of the Sun, and has effective temperature of 5,991 K, which gives it a yellow hue. Qatar-3 is also a metal poor star that has a similar metallicity to the Sun, and has a rapid rotation rate of 10.4 km/s. This means it takes Qatar-3 6.31 days to complete a full rotation, while the Sun takes almost a month to rotate.

## Planetary system

In 2016, the Qatar Exoplanet Survey discovered a planet around Qatar-3, Qatar-4, and Qatar-5, which was led by an international team in Qatar. Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, and has a similar radius to the latter. With a density of 4.0 g/cm3, this is one of the densest planets discovered. With an effective temperature of 1,681 K, it is a scorching planet.[4]

The Qatar-3 planetary system  Companion
(in order from star) | Mass | Semimajor axis
(AU) | Orbital period
(days) | Eccentricity | Inclination | Radius

|
|
|
|
|
|

b | 4.31 ± 0.47 MJ | 0.03783 ± 0.00069  | 2.5079204  | 0  | 86.8 ± 2.0° | 1.096 ± 0.14 RJ

Qatar-3b is a hot Jupiter.[5] It orbits its star every 2.5 days. It was discovered in 2016 by the Qatar Exoplanet Survey(QES).[6][7] This planet was discovered by QES along with Qatar-4b and Qatar-5b. The light curves of the planet's respective host stars have been observed as well during the survey, along with their stellar properties.[8][7]

### Orbit

This planet is another typical hot Jupiter. It orbits very close to its star with a period of 2 days, 12 hours, 11 minutes, and 24 seconds.[9] This corresponds with an orbital distance of about 0.04 AU, which is 10 times closer to its star than Mercury is to the Sun. With an eccentricity of 0, this suggests that Qatar-3b is on a perfectly circular orbit.

### Physical properties

Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, but a similar radius. With a density if 4.0 g cm−3, this is one of the densest planets discovered. With an effective temperature of 1,681 K, it is a scorched planet.[7]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
2. ↑ 2.0 2.1 2.2 2.3 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.
3. ↑ "Qatar 3". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Qatar+3.
4. ↑ "Astronomers discover three 'Qatar' exoplanets" (in en). https://phys.org/news/2016-06-astronomers-qatar-exoplanets.html.
5. ↑ "Qatar-3" (in en). 15 September 2018. https://www.universeguide.com/star/qatar3.
6. ↑ "Astronomers discover three 'Qatar' exoplanets". http://phys.org/news/2016-06-astronomers-qatar-exoplanets.html.
7. ↑ 7.0 7.1 7.2 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.
8. ↑ 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.
9. ↑ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". https://www.spikevm.com/calculators/conversions/decimal-day-hrs-min-sec.php.

* v
* t
* e

Constellation of Andromeda

* Adhil
* Andromeda in Chinese astronomy
* List of Andromeda's satellite galaxies
* List of stars in Andromeda

Stars|

| Bayer|

* α
* β
* γ
* δ
* ε
* ζ
* η
* θ
* ι
* κ
* λ
* μ
* ν
* ξ
* ο
* π
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ
* ω

|

Flamsteed|

* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* 15
* 18
* 22
* 23
* 26
* 28
* 32
* 36
* 39
* 41
* 44
* 45
* 47
* 49
* 51
* 55
* 56
* 58
* 59
* 60
* 62
* 63
* 64
* 65
* 66

Variable|

* R
* T
* U
* W
* Z
* RT
* RU
* RV
* RX
* SU
* SW
* TU
* TW
* WZ
* XZ
* AB
* AC
* AD
* AE
* AR
* BM
* BX
* CC
* CN
* DS
* DX
* EG
* ET
* EU
* FF
* GP
* GR
* GY
* HN
* KK
* KX
* KZ
* LL
* LP
* LQ
* OP
* OS
* OU
* PX
* QR
* QV
* QX
* V385
* V455
* V529

HD|

* 3
* 166
* 895
* 1185
* 1606
* 2421
* 2767
* 2942
* 3322
* 3346
* 4778
* 5608
* 5789/5788
* 6114
* 7853
* 8673
* 10307
* 13931
* 14622
* 15082
* 16004
* 16028
* 16175
* 217811
* 220105
* 221246
* 221776
* 222109
* 222399
* 223229
* 224365
* 224801
* 225218

Other|

* 3XMM J004232.1+411314
* 6 Persei
* ADS 48
* Groombridge 34
* HAT-P-6
* HR 178
* HR 8768
* M31-RV
* NGC 44
* NGC 82
* NGC 84
* NGC 91
* NGC 162
* NGC 464
* PA-99-N2
* Ross 248
* WASP-1
* WISE 0146+4234
* WISE J0005+3737
* WISE J004945.61+215120.0

| Exoplanets|

* 14 Andromedae b
* Upsilon Andromedae b
* c
* d
* e
* Gliese 15 Ab
* HD 13931 b
* HD 16175 b
* HAT-P-6b
* HAT-P-32b
* WASP-1b
* WASP-33b

|

| Star clusters|

* Mayall II
* NGC 206
* NGC 272
* NGC 752
* NGC 956
* NGC 7686

|

| Nebulae|

* NGC 7662

|

Galaxies|

| NGC|

* 5
* 11
* 13
* 19
* 21
* 20
* 27
* 39
* 43
* 48
* 49
* 51
* 67
* 68
* 69
* 70
* 71
* 72
* 74
* 76
* 79
* 80
* 81
* 83
* 85
* 86
* 90
* 93
* 94
* 96
* 97
* 108
* 109
* 112
* 140
* 149
* 160
* 169
* 181
* 183
* 184
* 214
* 218
* 226
* 228
* 229
* 233
* 243
* 252
* 258
* 260
* 262
* 280
* 304
* 317
* 389
* 393
* 404
* 425
* 431
* 477
* 478
* 512
* 513
* 523
* 528
* 536
* 668
* 679
* 687
* 700
* 703
* 704
* 705
* 708
* 709
* 710
* 712
* 714
* 717
* 732
* 753
* 759
* 891
* 1000
* 7640
* 7836

|

Numbered|

* I
* II
* III
* IV
* V
* VIII
* IX
* X
* XI
* XVIII
* XIX
* XXI

Other|

* 3C 66A
* 3C 66B
* Andromeda Galaxy
* Donatiello I
* Messier 32
* Messier 110

| Galaxy clusters|

* Abell 262
* NGC 68 group

|

| Astronomical events|

* GRB 101225A
* SN 1885A

|

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