Daily Sunspot Evaluation
Observation Sheet Saturday, 20 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)
- 6
- Number of spots (f)
- 12
- Relative number (R)
- 72
- Observer
- FL
- Reading
- all checks consistent
- File
- 19880820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 22 | 80W | 151 | 83W | 171 | |
| 2 | CAO – 2 | 15 | 65E | 6 | 62E | 10 | 183 |
| 3 | HK – 1 | -22 | 82W | 153 | 85W | 5 | 198 |
| 4 | BRO – 4 | -25 | 1E | 70 | 2W | 2.5 | 195 |
| 5 | BRO – 3 | -24 | 13E | 58 | 10E | 3 | 186 |
| 6 | AX – 1 | -17 | 56E | 15 | 53E | 187 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.