Daily Sunspot Evaluation
Observation Sheet Friday, 31 July 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)
- 12
- Number of spots (f)
- 105
- Relative number (R)
- 225
- Observer
- BG
- Reading
- all checks consistent
- File
- 19590731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 37 | 5E | ||||
| 2 | A – 1 | 20 | 25E | ||||
| 3 | F – 51 | 12 | 4E | ||||
| 4 | B – 10 | 13 | 22E | ||||
| 5 | J – 1 | 7 | 35E | ||||
| 6 | E – 27 | 5 | 44E | ||||
| 7 | J – 1 | -16 | 35W | ||||
| 8 | B – 3 | 7 | 48W | ||||
| 9 | ? – 1 | 19 | 83W | ||||
| 10 | J – 2 | 7 | 3W | ||||
| 11 | J – 4 | 15 | 18W | ||||
| 12 | H – 1 | 26 | 27W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.