21435+2721
- Unique Name: 21435+2721A 299AD
- RA: 21 43 31.64
- Dec: +27 20 37.3
- Discoverer: A
- Discoverer Number: 299
- Components: AD
- First year: 1875
- Last year: 2008
- Observations: 13
- First position angle: 64
- Last position angle: 64
- First separation: 405.2
- Last separation: 378.3
- Mag first component: 9.95
- Mag second component: 10.19
- Spectral type: G0+F6
- Primary proper motion RA: -28
- Primary proper motion DEC: -31
- Secondary proper motion RA: -241
- Secondary proper motion DEC: -161
- Durchmusterung: +26 4251
- Notes: N
