The existence and parameters of the ring system around the substellar companion J1407b were deduced from the observation of a very long and complex eclipse of the parent star lasting 56 days during April and May 2007. The discovery of the J1407 system and its unusual eclipses were first reported by a team led by University of Rochester astronomer Eric Mamajek in 2012. īy 2021, it was discovered the parent star is strongly variable, with a 5.4-year long magnetic activity cycle. Subsequent observations have not successfully detected J1407b, suggesting that it is on a highly eccentric orbit around the star. In 2007, J1407 was observed to be eclipsed and orbited by at least one major body, 1SWASP J1407b ( J1407b), thought to be either a large gas giant planet or a brown dwarf with an immense ring system. The star is variable due to the planet orbiting around it and has been given the variable star designation V1400 Centauri. The star's name comes from the SuperWASP ( Wide Angle Search for Planets) program and the star's coordinates. The star has an apparent magnitude of 12.3 and requires a telescope to be seen. A relatively young star, its age is estimated to be 16 million years, and its mass is about 90% that of the Sun. A graph of 1SWASP J1407 and J1407b to scale, showing the extent of the ring systemġSWASP J140747.93−394542.6 (also known as 1SWASP J140747, J1407 and Mamajek's Object) is a star similar to the Sun in the constellation Centaurus at a distance of about 434 light years from Earth.
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