Temperature
4645 K
4459 to 4649.1
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Stellar HostProfile
Qatar-2
Unclassified star • 181.4 pc
Records
13
literature rows
Planets
1
system count
References
14
distinct source labels
TIC: TIC 2521105
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Dai et al. 2017 • System source: TICv8
Mass
0.74 Msun
0.70 to 0.75
Radius
0.71 Rsun
0.66 to 0.78
Age
1.40 Gyr
1.40 to 17.50
Distance
181.4 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.71 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Qatar-2
0.71 R☉
System Layout
Known planets
1 planets linked to this host
Qatar-2 b
Transit
◌
Discovery
2011
Period
1.34 days
Radius
14.06 R⊕
Mass
792.6 M⊕
Eq. Temp
1344 K
Qatar-2 and Its Lone Planet
Qatar-2 is a star 592 light-years away with a single known planet. The host star is 1.4 billion years old and has a mass of 0.74 solar masses, a radius of 0.713 solar radii, and a temperature of 4650 K. Its mass, radius, and temperature are all lower than the Sun's.
The planet Qatar-2 b is a Jupiter-like world discovered by transit in 2011. Its transit observations revealed an orbital period of 1.34 days. It has a mass of 793 Earth masses, roughly 2.49 times Jupiter's mass and larger than Earth's, and a radius of 14.1 Earth radii, also larger than Earth's. Its mean density is 1.57 g/cm³, 0.285 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Stellar refs
13
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | 0.75 | — | 17.50 | — | — | 181.4 | Maxted et al. 2015 | TICv8 |
| 4645 | 0.74 | 0.71 | — | — | — | 181.4 | Bryan et al. 2011 | TICv8 |
| 4645 | 0.74 | 0.78 | 5 | — | — | 181.4 | Mancini et al. 2014 | TICv8 |
| — | — | — | — | — | — | 181.4 | Pope et al. 2016 | TICv8 |
| — | — | 0.66 | — | — | — | 181.4 | Petigura et al. 2018 | TICv8 |
| 4645 | 0.74 | 0.71 | 1.40 | — | — | 181.4 | Dai et al. 2017 | TICv8 |
| 4459 | 0.70 | 0.76 | — | -0.68 | — | 181.4 | TICv8 | TICv8 |
| 4649.1 | — | 0.66 | — | -0.73 | — | 181.4 | Gaia DR2 | TICv8 |
| 4645 | — | — | — | — | — | 181.4 | Yalçınkaya et al. 2024 | TICv8 |
| — | — | — | — | — | — | 181.4 | Barros et al. 2016 | TICv8 |
| — | 0.73 | 0.70 | — | — | — | 181.4 | Močnik et al. 2017 | TICv8 |
| — | — | 0.66 | — | — | — | 181.4 | Kruse et al. 2019 | TICv8 |
| 4645 | 0.74 | 0.78 | 7 | — | — | 181.4 | Bonomo et al. 2017 | TICv8 |