Qatar 1

Qatar 1  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Draco
Right ascension |  20h 13m 31.6176s
Declination | 65° 09′ 43.4909″
Apparent magnitude (V) | 12.84
Characteristics
Evolutionary stage | main sequence star
Spectral type | K3V
B−V color index | 1.06
V−R color index | 0.19
J−H color index | 0.472
J−K color index | 0.590
Astrometry
Radial velocity (Rv)| -37.835±0.063 km/s
Proper motion (μ)|  RA: 12.636±0.048 mas/yr
Dec.: 58.170±0.041 mas/yr
Parallax (π)| 5.3587 ± 0.0231 mas
Distance| 609 ± 3 ly
(186.6 ± 0.8 pc)
Details[1][2]
Mass| 0.85±0.03 M☉
Radius| 0.823±0.025 R☉
Surface gravity (log g)| 4.536±0.024 cgs
Temperature| 4861±125 K
Metallicity [Fe/H]| 0.2±0.1 dex
Rotational velocity (v sin i)| 1.7±0.3 km/s
Age| 4.5 Gyr
Other designations

Qatar-1, 2MASS J20133160+6509433, Gaia DR2 2244830490514284928[3]

Database references
SIMBAD| 1 data

Qatar 1 is a orange main sequence star in the constellation of Draco.

## Star characteristics

Qatar 1 has an average to high metallicity of 160% of solar,[1], and is of similar age to Sun.[2] The star has significant starspot activity.[4]

## Planetary system

The "Hot Jupiter" class planet Qatar-1 b was discovered around Qatar 1 in 2010.[1]. The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4±7.1 degrees.[2]. The planet's measured temperature is 1532±219 K.[5] Spectroscopic study in 2017 do suggest Qatar-1 b has relatively clear skies with a few clouds.[6]

Additional planets or brown dwarf in system were suspected in 2013,[7] but were refuted in 2015.[8][9]

The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system.[10]

The Qatar 1 planetary system[1][2][10] Companion
(in order from star) | Mass | Semimajor axis
(AU) | Orbital period
(days) | Eccentricity | Inclination | Radius

|
|
|
|
|
|

b | 1.33±0.05 MJ | 0.02343±0.0012  | 1.42002368±0.00000015  | 0.020+0.011−0.01 | 84.23±0.06° | 1.19±0.09 RJ

## References

1. ↑ 1.0 1.1 1.2 1.3 Alsubai, K. A.; Parley, N. R.; Bramich, D. M.; West, R. G.; Sorensen, P. M.; Collier Cameron, A.; Latham, D. W.; Horne, K. et al. (2011). "Qatar-1b: A hot Jupiter orbiting a metal-rich K dwarf star". Monthly Notices of the Royal Astronomical Society 417 (1): 709–716. doi:10.1111/j.1365-2966.2011.19316.x. Bibcode: 2011MNRAS.417..709A.
2. ↑ 2.0 2.1 2.2 2.3 Covino, E.; Esposito, M.; Barbieri, M.; Mancini, L.; Nascimbeni, V.; Claudi, R.; Desidera, S.; Gratton, R. et al. (2013). "The GAPS programme with HARPS-N at TNG". Astronomy & Astrophysics 554: A28. doi:10.1051/0004-6361/201321298.
3. ↑ Qatar 1 -- High proper-motion Star
4. ↑ Mislis, D.; Mancini, L.; Tregloan-Reed, J.; Ciceri, S.; Southworth, J.; d'Ago, G.; Bruni, I.; Baştürk, Ö. et al. (2015). "High-precision multiband time series photometry of exoplanets Qatar-1b and TrES-5b". Monthly Notices of the Royal Astronomical Society 448 (3): 2617–2623. doi:10.1093/mnras/stv197. Bibcode: 2015MNRAS.448.2617M.
5. ↑ Garhart, Emily; Deming, Drake; Mandell, Avi; Knutson, Heather A.; Wallack, Nicole; Burrows, Adam; Fortney, Jonathan J.; Hood, Callie et al. (2020). "Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses". The Astronomical Journal 159 (4): 137. doi:10.3847/1538-3881/ab6cff. Bibcode: 2020AJ....159..137G.
6. ↑ von Essen, C.; Cellone, S.; Mallonn, M.; Albrecht, S.; Miculán, R.; Müller, H. M. (2017). "Testing connections between exo-atmospheres and their host stars". Astronomy & Astrophysics 603: A20. doi:10.1051/0004-6361/201730506.
7. ↑ von Essen, C.; Schröter, S.; Agol, E.; Schmitt, J. H. M. M. (2013). "Qatar-1: Indications for possible transit timing variations". Astronomy & Astrophysics 555: A92. doi:10.1051/0004-6361/201321407. Bibcode: 2013A&A...555A..92V.
8. ↑ MacIejewski, G.; Fernández, M.; Aceituno, F. J.; Ohlert, J.; Puchalski, D.; Dimitrov, D.; Seeliger, M.; Kitze, M. et al. (2015). "No variations in transit times for Qatar-1 B". Astronomy & Astrophysics 577: A109. doi:10.1051/0004-6361/201526031. Bibcode: 2015A&A...577A.109M.
9. ↑ Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "Transit Timing Variation Measurements of WASP-12b and Qatar-1b: No Evidence for Additional Planets". arXiv:1512.00464 [astro-ph.EP].
10. ↑ 10.0 10.1 Investigating Extra-solar Planetary System Qatar-1 through Transit Observations, 2020

* v
* t
* e

Draco constellation

Stars
(list)|

| Bayer|

* α (Thuban)
* β (Rastaban)
* γ (Eltanin)
* δ (Altais)
* ε (Tyl)
* ζ (Aldhibah)
* η (Athebyne)
* θ
* ι (Edasich)
* κ
* λ (Giausar)
* μ (Alrakis)
* ν (Kuma)
* ξ (Grumium)
* ο
* π
* ρ
* σ (Alsafi)
* τ
* υ
* φ
* χ
* ψ1 (Dziban)
* ψ2
* ω

|

Flamsteed|

* 6
* 7 (Tianyi)
* 8 (Taiyi)
* 10 (i)
* 15 (A)
* 18 (g)
* 19 (h)
* 26
* 36
* 39 (b)
* 42 (Fafnir)
* 45 (d)
* 64 (e)
* 68

Variable|

* AG
* BY
* CL
* CM

HR|

* 3751
* 4126
* 5811
* 6237
* 6618 (Alruba)
* 6817
* 7137
* 7783

HD|

* 81817
* 101364

Gliese|

* Gliese 420
* Gliese 625
* Gliese 687

Kepler|

* 1
* 4
* 10
* 12
* 90
* 296

Other|

* G 240-72
* GD 356
* GRW +70 8247
* LP 71-82
* 2M 1237+6526
* Struve 2398
* WISE 1647+5632

Star clusters|

| Stellar streams|

* LAMOST 1

|

Nebulae|

| Planetary|

* Cat's Eye Nebula

|

Galaxies|

| NGC|

* 3147
* 4121
* 4125
* 4236
* 4319
* 4345
* 4513
* 5866
* 5879
* 5907
* 5949
* 5965
* 5982
* 5985
* 6090
* 6248
* 6285
* 6286
* 6340
* 6373
* 6394
* 6412
* 6503
* 6566
* 6621
* 6670
* 6786

|

Other|

* 3C 249.1
* 3C 305
* 3C 319
* 3C 371
* 3C 390.3
* 3C 401
* H1821+643
* HFLS3
* PGC 39058

Galaxy clusters|

* Abell 2218
* CL1358+62

Other|

* GRB 110328A
* SN 2005B
* Draco Supercluster

* List

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(0 votes)

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