21455+2156
- Unique Name: 21455+2156AG 276
- RA: 21 45 30.71
- Dec: +21 56 23.8
- Discoverer: AG
- Discoverer Number: 276
- Components:
- First year: 1901
- Last year: 2008
- Observations: 32
- First position angle: 357
- Last position angle: 2
- First separation: 2.1
- Last separation: 1.9
- Mag first component: 9.62
- Mag second component: 9.99
- Spectral type: F8
- Primary proper motion RA: 21
- Primary proper motion DEC: -27
- Secondary proper motion RA: 4
- Secondary proper motion DEC: 2
- Durchmusterung: +21 4611
- Notes:
