Daily Sunspot Evaluation
Observation Sheet Monday, 11 April 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)
- 89
- Relative number (R)
- 179
- Observer
- KA
- Reading
- all checks consistent
- File
- 19600411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 9 | 30 | 11E | ||||
| 2 | E – 32 | 11 | 33E | ||||
| 3 | J – 4 | 28 | 52E | ||||
| 4 | J – 2 | -12 | 52E | ||||
| 5 | E – 15 | -12 | 63E | ||||
| 6 | H – 20 | -9 | 6W | ||||
| 7 | J – 3 | -17 | 41W | ||||
| 8 | A – 3 | -13 | 50W | ||||
| 9 | J – 1 | -17 | 58W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.