21499-2509
- Unique Name: 21499-2509B 540
- RA: 21 49 52.80
- Dec: -25 09 04.2
- Discoverer: B
- Discoverer Number: 540
- Components:
- First year: 1925
- Last year: 1964
- Observations: 8
- First position angle: 169
- Last position angle: 326
- First separation: 0.2
- Last separation: 0.1
- Mag first component: 9.5
- Mag second component: 9.7
- Spectral type: A0/1V
- Primary proper motion RA: -9
- Primary proper motion DEC: -26
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: -2515601
- Notes: N
