| refcode | metd | author | reference |
| LDS | Luyten p.m. catalog (from additional DD list) | ................... |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 21408+2140 | LDS4903 | 1960 | 1 | 100 | 81.0 | 16.90 | 18.70 | 214047.00+214100.0 |