Mark A
- Unique Name: Mark A
- RA: 20 43 59.227
- Dec: -10 47 41.68
- Mag. V: 13.256
- Mag. B-V: -0.246
- Mag. U-B: -1.159
- Mag. V-R: -0.114
- Mag. R-I: -0.124
- Mag. V-I: -0.238
- N: 88.0
- M: 71.0
- Mean error of the mean V: 0.001
- Mean error of the mean B-V: 0.001
- Mean error of the mean U-B: 0.002
- Mean error of the mean V-R: 0.001
- Mean error of the mean R-I: 0.003
- Mean error of the mean V-I: 0.003