| discov_num | notes | refcode |
| HDO 221 | Classification of the B component is from Lindroos (1985), who finds a | Lnd1985 |
| distance of 2.5 kpc. | Msn1998a |
| refcode | metd | author | reference |
| Lnd1985 | - | Lindroos, K.P. | 1985A&AS...60..183L |
| Lnd1985 | A&AS 60, 183, 1985 | ||
| Msn1998a | Sc j | Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., | 1998AJ....115..821M |
| Msn1998a | ten Brummelaar, T.A., & McAlister, H.A. | ||
| Msn1998a | AJ 115, 821, 1998 |
| idgroup | discov | author |
| 1 | HDO | Harvard Obs. |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 12560-5650 | HDO 221 | 2000 | 4 | 314 | 29.2 | 5.32 | 11.77 | O9Ibe | N D | 125557.14-565008.9 | |
| 12560-5650 | HDO 221 | 2011 | 6 | 322 | 30.3 | 5.32 | 11.77 | O9Ibe | N D | 125557.14-565008.9 | |
| 12560-5650 | HDO 221 | 2018 | 8 | 316 | 29.6 | 5.32 | 11.77 | O9Ibe | N | 125557.14-565008.9 |