V1298 Tauri

The star appears in x-rays from ROSAT data and it does show strong lithium absorption lines, both signatures of youth and therefore it was a proposed member of Taurus-Auriga.

[3] The brightness of V1298 Tauri varies in an unpredictable way between a maximum visual magnitude of 10.31 and a minimum of 10.54.

[2] The light curve of the star shows quasi-periodic variability that was interpreted as stellar rotation and starspots.

[3] Based on Gaia DR2 data this star is part of a co-moving pair, together with HD 284154.

Planet e only shows a single transit in the K2 light curve and has a period larger than 36 days.

[9] The planet c was suspected to be shedding mass due to intense irradiation by the host star, but hydrogen tail existence was refuted by 2021.

[14] Planet e was possibly detected by Kepler, TESS and CHEOPS in three transits with an orbital period of around 45 days.

A light curve for V1298 Tauri, adapted from David et al. (2019) [ 3 ]