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HAT-P-21 is a G-type main sequence star about 910 light-years away. The star has an amount of metals similar to solar abundance. The 2015 survey has not been able to detect any stellar companions. The star rotates rapidly, being driven Continue Reading

HAT-P-20b orbits a V = 11.339 K3 dwarf star with a period P = 2.875317 +/- 0.000004d. The central star has a mass of 0.760 +/- 0.03 solar masses, radius of 0.690 +/- 0.02 Rsun, teff = 4595 +/- 80 Continue Reading

HAT-P-19b orbits around V = 12.901 K1 dwarf star GSC 2.283-00.589, with a period P=4.008778 + -0.000006 d, transit epoch Tc= -0.00034 2.455.091.53417+ (BJD), and transit duration 0.1182 -0.0014 + d. The central star has a mass of 0.84 solar Continue Reading

HAT-P-17 is a K-type main sequence star about 92.6 parsecs (302 ly) away. It has a mass of about 0.857 ± 0.039 M☉. It is the host of two planets, HAT-P-17b and HAT-P-17c, both discovered in 2010. A search for Continue Reading

HAT-P-18 is a K-type main sequence star about 530 light-years away. The star is very old and has a concentration of heavy elements similar to solar abundance. A survey in 2015 detected very strong starspot activity in HAT-P-18. In 2010, Continue Reading

HAT-P-4b is an extrasolar planet orbiting the star BD+36º2593 more than 1,000 light-years away in the constellation Boötes. It was discovered by means of the transit method on October 21, 2007. It is the fourth planet detected by the HATNet Continue Reading

HAT-P-5b is an extrasolar planet orbiting the star HAT-P-5, more than 1,100 light-years away, in the constellation Lyra. It was discovered through the transit method in 2007. It is the fifth planet detected by the HATNet Project. The planet is Continue Reading

HAT-P-3b is an extrasolar planet that lies 457 light-years from Earth. It was discovered by the HATNet project, using the transit method. Its mass is estimated at about 0.6 times that of Jupiter, with a heavy metal center of about Continue Reading

HAT-P-9b is an extrasolar planet about 1,560 light-years away in the constellation Auriga. This planet was found by transit method on June 26, 2008. It has a mass of 78% jupiter and a radius of 140% jupiter. As for all Continue Reading

HAT-P-10b or WASP-11b. It is an extrasolar planet that orbits the star WASP-11, a star of apparent magnitude 11.9, spectral type K3 and that has a temperature in its photosphere of 4900 K. It is located about 290 light years Continue Reading