Daily Sunspot Evaluation
Observation Sheet Monday, 19 August 1957
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)
- 15
- Number of spots (f)
- 110
- Relative number (R)
- 260
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 33 | 26E | ||||
| 2 | E – 43 | 17 | 38E | ||||
| 3 | A – 6 | 14 | 73E | ||||
| 4 | I – 3 | 10 | 32E | ||||
| 5 | A – 2 | 10 | 65E | ||||
| 6 | A – 1 | -29 | 14E | ||||
| 7 | A – 1 | -26 | 11E | ||||
| 8 | A – 7 | -32 | 4W | ||||
| 9 | E – 12 | -22 | 3W | ||||
| 10 | C – 16 | -20 | 17W | ||||
| 11 | A – 1 | -9 | 59W | ||||
| 12 | C – 4 | 13 | 68W | ||||
| 13 | ? – 2 | 16 | 78W | ||||
| 14 | A – 4 | 22 | 51W | ||||
| 15 | C – 7 | 21 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.