The dimmer component of this system was shown to be an overtone pulsator with a current period of about 4 days by the Navy Prototype Optical Interferometer in 2000.
The dimmer component of this system was shown to be an overtone pulsator with a current period of about 4 days by the Navy Prototype Optical Interferometer in 2000. The irregularity of its Cepheid component and a recent recalculation of the distance to this ternary system may account for the variability of this object's magnitude, which has increased by an order since ancient times. This 51st brightest star contains a spectroscopic binary and can be found in the sky with the help of Merak and Dubhe. FTP, name this star whose position was once held by Thuban and will one day be held by Vega, and which is also known as Alpha Ursae Minoris and the North Star.
The dimmer component of this system was shown to be an overtone pulsator with a current period of about 4 days by the Navy Prototype Optical Interferometer in 2000.
Polaris (accept the North Star or polestar or Alpha Ursae Minoris or before they're mentioned)