[4] Both members of the binary are medium-mass objects still contracting towards the main sequence and accreting mass.

Their ages are probably young (below 10 million years) but cannot be estimated with any accuracy because both stars are strongly obscured by the protoplanetary disks.

[6] The companion star HK Tauri B is surrounded by a protoplanetary disk visible nearly edge-on.

The disk mass is relatively small, not larger than 0.0005M☉, and dust distribution is asymmetric.

[10] Multiple planets embedded in the disk of HK Tauri B have been suspected since 1993,[11] although none were detected by 2020.