Daily Sunspot Evaluation
Observation Sheet Friday, 21 August 1959
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)
- 13
- Number of spots (f)
- 147
- Relative number (R)
- 277
- Observer
- FY
- Reading
- all checks consistent
- File
- 19590821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 25 | 76E | ||||
| 2 | ? – 6 | 18 | 24E | ||||
| 3 | F – 44 | 17 | 53E | ||||
| 4 | C – 7 | -23 | 1E | ||||
| 5 | A – 2 | -9 | 2W | ||||
| 6 | A – 1 | -7 | 10W | ||||
| 7 | A – 1 | -6 | 18W | ||||
| 8 | ? – 2 | -16 | 80W | ||||
| 9 | F – 60 | 7 | 17W | ||||
| 10 | A – 4 | 12 | 15W | ||||
| 11 | E – 9 | 13 | 20W | ||||
| 12 | B – 5 | 21 | 29W | ||||
| 13 | B – 5 | 24 | 72WE |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.