Daily Sunspot Evaluation
Observation Details Wednesday, 20 September 2017
- No
- 18171
- Date
- 2017 / 09 / 20,375
- Time
- 09:00 UT
- Seeing
- 4 / 5
- Number of groups (g)
- 2
- Number of spots (f)
- 2
- Relative number (R)
- 22
- Lf
- 2
- P0
- 24.88°
- B0
- 7.10°
- L0
- 259.02°
- Observer
- Özgecan ÖNALTAŞ
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | NOAA |
|---|---|---|---|---|---|---|---|
| 1 | HS_ – 1 | 9 | 57.3W | 316 | 59.3W | 3.1 | |
| 2 | HS_ – 1 | -13 | 78.7E | 180 | 76.7E | 4.8 |
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