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OGLE-TR-123
OGLE-TR-123 is a binary stellar system containing one of the smallest main-sequence stars whose radius has been measured. It was discovered when the Optical Gravitational Lensing Experiment (OGLE) survey observed the smaller star eclipsing the larger primary. The orbital period is approximately 1.80 days. The smaller star, OGLE-TR-123b, is estimated to have a radius around 0.13 solar radii, and a mass of around 0.085 solar masses (), or approximately 90 times Jupiter's. OGLE-TR-123b's mass is close to the lowest possible mass, estimated to be around 0.07 or 0.08 , for a hydrogen-fusing star. Gilles Chabrier and Isabelle Baraffe, ''Annual Review of Astronomy and Astrophysics'' 38 (2000), pp. 337–377. OGLE-TR-123b is the second star with mass less ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EBLM J0555-57
EBLM J0555-57 is a Star system#Triple star systems, triple star system approximately 670 light-years from Earth. EBLM J0555-57Ab, the smallest star in the system, orbits its primary star with a period of 7.8 days, and at the time of discovery, was the smallest known star with a mass sufficient to enable the Proton–proton chain reaction, fusion of hydrogen in its core. System EBLM J0555-57, also known as CD−57 1311, is a triple star system in the constellation Pictor, which contains a visual binary system consisting of two sun-like stars separated by 2.5": EBLM J0555-57Aa, a magnitude 9.98 spectral type F8 star, and EBLM J0555-57B, a magnitude 10.76 star. No orbital motion has been detected but they have almost identical radial velocities and are assumed to be gravitationally bound. Component A of the system is itself an Binary star#Eclipsing binaries, eclipsing binary (EBLM J0555-57Ab orbiting EBLM J0555-57Aa). Eclipses, also known as Transit (astronomy), tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
