reference star
(astronomy) A star whose identity, position and magnitude are accurately known
plural of breathalyser
(organic chemistry) Describing any heterocycle having one or more phosphorus atoms in the ring
(anatomy) The anterior segment of the sternum; the manubrium.
望遠鏡の測光を校正する際に、等級が高精度で測定されている基準星を観測しました。
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