HAT-P-3 [SEP] constellation
HAT-P-3
HAT-P-3, is a metal-rich K star located about 450 light-years away in the constellation Ursa Major. At a magnitude of about 11.5 it is not visible to the naked eye but is visible in a small to medium-sized amateur telescope. It is believed to be a relatively young star and has a slightly enhanced level of chromospheric activity.
Planetary system.
This star is home to the extrasolar planet HAT-P-3b discovered by the HATNet Project using the transit method.
HAT-P-1b
HAT-P-1b is an extrasolar planet orbiting the Sun-like star HAT-P-1, also known as ADS 16402 B. HAT-P-1 is the dimmer component of the ADS 16402 binary star system. It is located roughly 521 light years away from Earth in the constellation Lacerta. HAT-P-1b is among the least dense of any of the known extrasolar planets.
Discovery.
HAT-P-1b was detected by searching for astronomical transits of the parent star by orbiting planets. As the planet passes in