| discov_num | notes | refcode |
| OSO 139 | G187-018. AC and AD are not common proper motion pairs, based on | |
| comparison with POSS2 red plates | Oso2004 |
| refcode | metd | author | reference |
| Oso2004 | C j | Zapatero Osorio, M.R. & Martin, E.L. | 2004A&A...419..167Z |
| Oso2004 | +Pa | A&A 419, 167, 2004 |
| discov | author |
| OSO | Zapatero Osorio, M.R. & Martin, E.L. |
| OSO | Zapatero Osorio, M.R., Martin, E.L., Lane, B.F., Pavlenko, Ya., Bouy, H., |
| OSO | Baraffe, I., & Basri, G. |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | dm_number | notes | coord_arcsec_2000 |
| 21031+2929 | OSO 139 | AD | 1998 | 3 | 112 | 25.6 | 10.19 | 13.40 | N D | 210306.12+292856.2 | ||
| 21031+2929 | OSO 139 | AD | 2002 | 4 | 110 | 26.3 | 10.19 | 13.40 | N D | 210306.12+292856.2 |