00521+2520
- Unique Name: 00521+2520TDS1644
- RA: 00 52 04.06
- Dec: +25 20 15.1
- Discoverer: TDS
- Discoverer Number: 1644
- Components:
- First year: 1991
- Last year: 2004
- Observations: 2
- First position angle: 353
- Last position angle: 2
- First separation: 2.4
- Last separation: 2.3
- Mag first component: 12.2
- Mag second component: 12.51
- Spectral type:
- Primary proper motion RA: 2
- Primary proper motion DEC: -8
- Secondary proper motion RA: 2
- Secondary proper motion DEC: -8
- Durchmusterung: +24 125
- Notes: