Daily Sunspot Evaluation
Observation Sheet Sunday, 11 September 1960
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)
- 9
- Number of spots (f)
- 53
- Relative number (R)
- 143
- Observer
- AK
- Reading
- all checks consistent
- File
- 19600911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 14 | 22E | ||||
| 2 | D – 7 | 13 | 53E | ||||
| 3 | B – 9 | -3 | 56E | ||||
| 4 | H – 1 | -15 | 7W | ||||
| 5 | C – 11 | -7 | 18W | ||||
| 6 | D – 9 | -5 | 45W | ||||
| 7 | C – 9 | 18 | 25W | ||||
| 8 | A – 1 | 20 | 12W | ||||
| 9 | A – 3 | 29 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.