Qatar 2
Sign in to saveQatar-2 is a K-type main-sequence star about 595 light-years away in the constellation of Virgo. The star is much older than Sun, and has a concentration of heavy elements similar to solar abundance. The star features a numerous and long-lived starspots, and belongs to a peculiar variety of inflated K-dwarfs with strong magnetic activity inhibiting internal convection.
Wikidata facts
- Constellation
- Virgo
- Distance from Earth
- 182.319
- Radius
- 0.78
- Mass
- 0.74
Show 15 more facts
- catalog code
- EPIC 212756297
- effective temperature
- 4645
- parallax
- 5.4823
- apparent magnitude
- 13.015017
- radial velocity
- -27.7
- epoch
- J2000.0
- spectral class
- K
- metallicity
- 0.02
- surface gravity
- 40000
- luminosity
- 0.18497734
- right ascension component of proper motion
- -88.171
- declination component of proper motion
- -15.187
- age estimated by a dating method
- 5.0
- right ascension
- 207.65587513609998
- declination
- -6.80400599279
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Encyclopedic overview
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- Planetary system
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Qatar-2 is a K-type main-sequence star about 595 light-years away in the constellation of Virgo. The star is much older than Sun, and has a concentration of heavy elements similar to solar abundance. The star features a numerous and long-lived starspots, and belongs to a peculiar variety of inflated K-dwarfs with strong magnetic activity inhibiting internal convection.
==Planetary system== In 2011 a transiting superjovian planet Qatar-2b was detected by the Qatar Exoplanet Survey. The planet has a large measured temperature difference between dayside and nightside . The planetary orbit is well aligned with the equatorial plane of the star, misalignment angle equal to . No orbital decay was detected. The color of planetary atmosphere is blue due to Rayleigh scattering of light, and albedo is very low, being below 0.06.
Excerpted from Wikipedia’s “Qatar 2” article, available under the CC BY-SA 4.0 licence.