We present photometric B, V, and R observations of the semiregular variable V698 Tau taken in 2020–2021. The star varies by ∼1 mag in each filter with a mean period of ∼185 days. At minimum light the star is noticeably redder in V − R than at maximum while slightly bluer in B − V. The magnitudes and colors are consistent with those of a reddened M8 giant.

中文翻译：

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半正则变量 V698 Tau 的多色光度法

我们展示了在 2020-2021 年对半正则变量 V698 Tau 进行的光度B、V和R观测。恒星在每个过滤器中变化 ∼1 mag，平均周期为 ∼185 天。在最小光照下，恒星在V  -  R处明显比在最大值时更红，而在B  -  V处稍蓝。大小和颜色与变红的 M8 巨星一致。