Lacaille 8760
Script error: No such module "Check for unknown parameters".
Lacaille 8760 (AX Microscopii) is a red dwarf star in the constellation Microscopium. It is one of the nearest stars to the Sun at about 12.9 light-years' distance, and the brightest M-class main-sequence star in Earth's night sky, although it is generally too faint to be seen without a telescope. At an apparent magnitude of +6.7, it may only be visible to the unaided eye under exceptionally good viewing conditions, under dark skies.
This star was originally listed in a 1763 catalog that was published posthumously by the French Abbé Nicolas-Louis de Lacaille. He observed it in the southern sky while working from an observatory at the Cape of Good Hope.[10] Number 8760 was assigned to this star in the 1847 edition of Lacaille's catalogue of 9,766 stars by Francis Baily.[11]
In the past, Lacaille 8760 has been classified anywhere from spectral class K7 down to M2. In 1979, the Irish astronomer Patrick Byrne discovered that it is a flare star,[12] and it was given the variable star designation AX Microscopii, or AX Mic. As a flare star it is relatively quiescent.
Lacaille 8760 is one of the largest and brightest red dwarfs known, with about 60%[2] the mass and 51%[5] the radius of the Sun. It is about five[9] billion years old and is spinning at a projected rotational velocity of 3.3 km/s.[4] The star is radiating 7.2%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 3,800 K.[7]
Despite efforts by astronomers, as of 2011 no planets had been detected in orbit around this star.[13]
Lacaille 8760 orbits around the galaxy with a relatively high ellipticity of 0.23.[14] Its closest approach to the Sun occurred about 20,000 years ago when it came within Script error: No such module "convert"..[15] Due to its low mass (60% of the Sun), it has an expected lifespan of about 75 billion (7.5 × 1010) years,[16] seven times longer than the Sun's.
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e Template:Cite Gaia DR3
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1". See the online data.
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".Vizier catalog entry
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Francis Baily. A Catalogue of 9766 Stars (1847), Page 219
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".