UV Cetus - Whale UV Star

Japanese: くじら座 UV 星 - くじらざゆーぶいせい

...Its maximum and minimum luminosity are not yet determined, and it does not brighten to 3rd magnitude, and sometimes it fades, so it often disappears from view with the naked eye. Other stars include UV Ceti, known as a flare star, T Ceti, a semiregular variable star, and the spiral galaxy M77. Its approximate position is 1h45m in right ascension and -12° in declination. ...

From [Flare Star]

…In the 1950s, it was recognized as a new type of variable star. It is typically a UV Ceti star, and most of this type belong to the M-type emission line stars. The brightening is most noticeable in the ultraviolet range, and can reach magnitude 6 or more. …

*Some of the terminology that mentions "UV Cetus" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…極大光度も極小光度も確定しておらず，3等まで明るくならずに，また暗くなることもあり，肉眼の視界から消えていることが多い。ほかにフレア星で知られるくじら座UV星，半規則変光星のくじら座T星，渦巻銀河M77などがある。概略位置は赤経1h45m，赤緯－12゜。…