出典:Wikipedia
出典:『Wikipedia』 (2011/07/20 15:19 UTC 版)
GJ 1214 (Gliese-Jahreiss 1214) is a dim M4.5 red dwarf in the constellation Ophiuchus with an apparent magnitude of 14.7. It is located at a distance of approximately 40 light years from Earth. It is about one-fifth as large as the Sun with a surface temperature estimated to be 3,000 K (2700 °C). Its luminosity is only 0.3% that of the Sun.