The revised Yerkes Atlas system (Johnson & Morgan, 1953) listed only two M type spectral standard stars: HD 147379 (M0V) and HD 95735/Lalande 21185 (M2V). For each star, open the Search window (F3) and enter the star’s name.Click on the star and look at the displayed information at the upper right. The star is located only about 8.3 light-years away in the constellation Ursa Major. We announce the discovery of two planets orbiting the M dwarfs GJ 251 ($0.360\\pm0.015$ M$_\\odot$) and HD 238090 ($0.578\\pm0.021$ M$_\\odot$) based on CARMENES radial velocity (RV) data. M2. While HD 147379 was not considered a standard by expert classifiers in later compendia of standards, Lalande 21185 is still a … Lalande 21185 is a red dwarf (spectral type: M2V) only 8.31 light years distant from the Sun. In 1970, Castor A and Castor B were separated by less than 2 arcseconds. Jupiter-sized planet orbiting at twice Earth's distance at sub-Saturn temperatures; Orbit takes 5.9 years. A number of nearby stars – Barnard’s Star, Kapteyn’s Star, Lalande 21185, 61 Cygni, Ross 248 and possibly Procyon – are also included in this class. It is the fourth closest star system to our solar system, after Alpha Centauri, Barnard’s Star and Wolf 359. In addition, we independently confirm with CARMENES data the existence of Lalande 21185 b, a planet that has recently been discovered with the SOPHIE spectrograph. It was one of the systems first colonised under the First Diaspora between 2118 and 2148. Lalande 21185 Star Factoids. This spectral type M2V star was first found listed in Histoire Céleste Française published in 1801 and prepared by the French astronomer Jérôme Lalande (1732-1807) of the Paris Observatory. Lalande 21185 is a Spectral Class M2V star located some 8.3 light years away from Sol. The system became known as spectral class, and the letters most stars are assigned are O, B, A, F, G, K, M (going from hot to cool). Lalande 21185. Procyon A F5 +2.7 2. The star is the current Spectral Standard star for class M1 V. Lalande 21185 System (M2 V) - Lalande 21185 is also called GJ 411 and informally Proxima Ursa Majoris. Two stars Lalande 21185 (M2 V) and Betelgeuse (M2 I) are the same spectral type M2, but Betelgeuse is luminosity class I and Lalande 21185 is luminosity class V. … For this lab, you will need to record the spectral class and absolute magnitude of a group of near stars and a group of the brightest stars in the night sky. Centari C M5 +15.0 19. It has been the spectral standard star for class M2 V for a long time. It is the third brightest red dwarf in the night sky. Sun G2 +4.8 16. 10.5. Lalande 21185. M2.1V spectral class; 46% Solar Mass, 46% Solar Diameter, 63% Solar Metalicity; A flare star; Older than the Sun, younger than 10 Billion Years old; Lalande 21185 b Factoids. Procyon B F0 +13.0 3. (ST reference: Spaceflight Chronology) On several occasions in 2364, viewscreen readouts aboard the USS Enterprise-D showed the location of Lalande 21185, in the form of charts from the Enterprise library computer. 8. Struve 23948 M5 +11.9 5. It has an apparent magnitude of 7.520 and cannot be seen by the naked eye. ~ ~ is a red dwarf (spectral type: M2V) only 8.31 light years distant from the Sun. Struve 2398 M4 +11.1 4. Centari B K5 +5.8 18. It is not known whether the colony continues to be known simply as Lalande 21185, or whether the system is now known by the name of its capital world - as is the case with Vekta, Helghan and Gyre. Centari A G2 +4.4 17. Each letter is subdivided using a number from 0-9 (hot to cool), so a B3 star is slightly hotter than a B4 star. It is the fourth closest star system to the Sun at 8.3 ly. 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