BP Tauri is a young T Tauri star in the constellation of Taurus about away, belonging to the Taurus Molecular Cloud.
Properties BP Tauri is still accreting mass at the low rate of and /year, as evidenced by X-rays produced by infalling matter, and may be still in the process of spin-up. Its chromospheric magnetic fields are rather strong at 2.5 kilogauss, and contains strong non-dipole components. The star is producing 40% of its luminosity via the energy released by accretion.
Suspected companions There were two suspected stellar companions to BP Tauri on projected separations 3.00 and . These were proven to be a background stars not related to BP Tauri with Gaia data though.
Protoplanetary system The star is surrounded by a protoplanetary disk. The disk is strongly depleted in carbon and carbon monoxide.
Variability In 1935, Inna N. Lehmann-Balanowskaja discovered that BP Tauri is a variable star. Its variation in brightness is caused by strong flares due to unsteady accretion held by the stellar magnetic field. The lightcurve period is variable from 6.1 to 7.6 days, and quiescent periods without variability are also known.
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