Daily Sunspot Evaluation
Observation Sheet Sunday, 21 August 1988
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)
- 4
- Number of spots (f)
- 7
- Relative number (R)
- 47
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 4 | 14 | 50E | 7 | 48E | 9.5 | 183 |
| 2 | AX – 1 | 22 | 64E | 353 | 62E | 188 | |
| 3 | AX – 1 | -27 | 10W | 61 ⚠ | 12W | 185 | |
| 4 | AX – 1 | -24 | 1E | 56 | 1W | 186 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.