G21 15
- Unique Name: G21 15
- RA: 18 27 13.08
- Dec: +04 03 46.7
- Mag. V: 13.889
- Mag. B-V: 0.092
- Mag. U-B: -0.598
- Mag. V-R: -0.039
- Mag. R-I: -0.03
- Mag. V-I: -0.069
- N: 19.0
- M: 9.0
- Mean error of the mean V: 0.005
- Mean error of the mean B-V: 0.005
- Mean error of the mean U-B: 0.007
- Mean error of the mean V-R: 0.005
- Mean error of the mean R-I: 0.009
- Mean error of the mean V-I: 0.009
