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SCR 1845−6357
SCR 1845−6357 is a binary system, away in the constellation Pavo. The primary is a low-mass red dwarf and the secondary is a brown dwarf. It is one of the nearest stellar systems, as well as the closest red dwarf-brown dwarf binary. System The primary, SCR 1845−6357A, is an ultra-cool red dwarf, one of the smallest and coolest stars so far discovered, with a mass of about 7% of the Sun's, a radius 9.4% of the Sun's, and an effective temperature of . It is very faint, at an apparent magnitude of 17.4 due to its low luminosity, equivalent to 0.03% of the Sun's luminosity across all wavelengths. It was discovered in 2004 by the SuperCOSMOS survey. This star has been found to have a brown dwarf companion in 2006, designated . The companion has an observed distance of 4.1 AU from the primary and is classified as a T-dwarf. It is estimated to have 25 to 65 times the mass of Jupiter (2.4 to 6.2% of the Sun's mass), but its radius is 30% smaller than that of Ju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavo (constellation)
Pavo is a constellation in the Southern Celestial Hemisphere, southern sky whose name is Latin for . Pavo first appeared on a 35-cm (14 in) diameter celestial globe published in 1598 in Amsterdam by Petrus Plancius and Jodocus Hondius and was depicted in Johann Bayer's star atlas ''Uranometria'' of 1603, and was likely conceived by Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. French explorer and astronomer Nicolas-Louis de Lacaille gave its stars Bayer designations in 1756. The constellations Pavo, Grus (constellation), Grus, Phoenix (constellation), Phoenix and Tucana are collectively known as the "Southern Birds". The constellation's brightest member, Alpha Pavonis, is also known as Peacock and appears as a 1.91-Apparent magnitude, magnitude blue-white star, but is actually a spectroscopic binary. Delta Pavonis is a nearby Sun-like star some 19.9 light-years distant. Six of the star systems in Pavo have been found to host planets, inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
