Extrinsic variable stars

Japanese: 外因的変光星 - がいいんてきへんこうせい
Extrinsic variable stars

...QZ is the 334th, and from the 335th, the Roman letter V (the first letter of variable star) is added to the beginning, so V335, V336, etc.
[Classification of variable stars]
Variable stars are broadly classified into two types, extrinsic variables and intrinsic variables, depending on the cause of their variation. (1) Extrinsic variables are also called geometric variables, and although the brightness of the star itself does not change, the geometric position of the star changes relative to the observer, so the apparent brightness observed changes. …

*Some of the terminology that refers to "extrinsic variables" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…QZが334番目で,335番目からは,ローマ字V(variable starの頭文字)を頭につけV335,V336,……と続けられる。
[変光星の分類]
 変光星は,大別するとその変光原因によって外因的変光星と内因的変光星の二つに分類される。(1)外因的変光星は,幾何学的変光星とも呼ばれ,星本体の明るさは変化していないのだが,星の幾何学的位置関係が観測者に相対的に変化するために,見かけの明るさが変化して観測される星である。…

※「外因的変光星」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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