| discov_num | notes | refcode |
| ENG 80 | AB: Optical pair, based on study of relative motion of the components | |
| using the method of apparent motion parameters. | Kiy2008 |
| refcode | metd | author | reference |
| Kiy2008 | - | Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. | 2008SvAL...32..405K |
| Kiy2008 | SvAL 34, 405, 2008 |
| idgroup | discov | author |
| 1 | ENG | (Note: Some time after publication of the IDS, the designation for Engelmann was |
| 47 | KIY | Kiyaeva, O.V., Zhuchkov, R.Ya., Malogolovets, E.V., Orlov, V.V., Glukhova, A.V., |
| 47 | KIY | Balega, Yu., Yu. & Bikmaev, I.F. |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 21053+0704 | ENG 80 | AB | 2002 | 10 | 233 | 68.9 | 8.49 | 11.11 | K5 | NLD | 210519.74+070409.4 |
| 21053+0704 | ENG 80 | AB | 2019 | 13 | 240 | 64.6 | 8.49 | 11.11 | K5 | NL U | 210519.74+070409.4 |