Daily Sunspot Evaluation
Observation Details Thursday, 20 April 2017
- No
- 18025
- Date
- 2017 / 04 / 20,313
- Time
- 07:30 UT
- Seeing
- 3 / 5
- Number of groups (g)
- 2
- Number of spots (f)
- 17
- Relative number (R)
- 37
- Lf
- 2
- P0
- -25.58°
- B0
- -5.17°
- L0
- 123.08°
- Observer
- Başar COŞKUNOĞLU
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | NOAA |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 16 | 12 | 55E | 68 | 53E | 4.9 | |
| 2 | AX_ – 1 | 12 | 69E | 54 | 67E | - |