Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 August 1999
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 3
- Number of spots (f)
- 21
- Relative number (R)
- 51
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19990818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 11 | 16 | 07E | 351 | 04E | 4 | Gr-11 |
| 2 | HK – 7 | 20 | 23E | 335 | 20E | 6 | |
| 3 | BXO – 3 | -10 | 47W | 44 | 50W | 4 | Gr-3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.