Daily Sunspot Evaluation
Observation Sheet Friday, 11 August 1961
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)
- 7
- Number of spots (f)
- 31
- Relative number (R)
- 101
- Observer
- MH
- Reading
- all checks consistent
- File
- 19610811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 14 | 14 | 40E | ||||
| 2 | J – 1 | 7 | 63E | ||||
| 3 | A – 5 | -2 | 63E | ||||
| 4 | A – 1 | -5 | 41E | ||||
| 5 | A – 1 | -13 | 21W | ||||
| 6 | A – 1 | -11 | 48W | ||||
| 7 | D – 8 | 17 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.