21423+2800
- Unique Name: 21423+2800GRV 494
- RA: 21 42 20.13
- Dec: +28 00 35.6
- Discoverer: GRV
- Discoverer Number: 494
- Components:
- First year: 1997
- Last year: 2002
- Observations: 4
- First position angle: 323
- Last position angle: 323
- First separation: 63.1
- Last separation: 63.0
- Mag first component: 12.65
- Mag second component: 14.12
- Spectral type:
- Primary proper motion RA: -14
- Primary proper motion DEC: -16
- Secondary proper motion RA: -13
- Secondary proper motion DEC: -14
- Durchmusterung:
- Notes: