Star in the constellation Draco
! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000      Equinox 
! style="text-align:left" | Constellation
! style="text-align:left" | 
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Evolutionary stage
! style="text-align:left" | Spectral type
! style="text-align:left" | B−V 
! style="text-align:left" | V−R 
! style="text-align:left" | R−I 
! style="text-align:left" | J−H 
! style="text-align:left" | J−K 
! style="text-align:left" | Variable type
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Qatar-1 is an orange main sequence star in the constellation of Draco.
Star characteristics.
Qatar-1 has an average to high metallicity of 160% of solar, and is of similar age to Sun. The star has significant starspot activity.
Planetary system.
The "Hot Jupiter" class planet Qatar-1b was discovered by the Qatar Exoplanet Survey in 2010. 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. The planet has a large measured temperature difference between dayside (1696±39 K) and nightside (1098±158 K). A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.
Additional planets or a brown dwarf in the system were suspected in 2013, but were refuted in 2015.
The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system, although by 2022 additional transit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.
! align=center| Companion
! align=center| Mass
! align=center| Semimajor axis
! align=center| Orbital period
! align=center| Eccentricity
! align=center| Inclination
! align=center| Radius
References.
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