Mark A4
- Unique Name: Mark A4
- RA: 20 43 53.555
- Dec: -10 45 05.17
- Mag. V: 14.767
- Mag. B-V: 0.795
- Mag. U-B: 0.176
- Mag. V-R: 0.471
- Mag. R-I: 0.475
- Mag. V-I: 0.952
- N: 22.0
- M: 11.0
- Mean error of the mean V: 0.002
- Mean error of the mean B-V: 0.003
- Mean error of the mean U-B: 0.004
- Mean error of the mean V-R: 0.003
- Mean error of the mean R-I: 0.004
- Mean error of the mean V-I: 0.005