Daily Sunspot Evaluation
Observation Sheet Thursday, 10 April 1958
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)
- 13
- Number of spots (f)
- 83
- Relative number (R)
- 213
- Observer
- WG
- Reading
- all checks consistent
- File
- 19580410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | 14 | 47E | ||||
| 2 | J – 1 | -4 | 73E | ||||
| 3 | B – 10 | -13 | 32E | ||||
| 4 | B – 5 | -21 | 31E | ||||
| 5 | A – 4 | -11 | 1E | ||||
| 6 | B – 10 | -14 | 15W | ||||
| 7 | J – 1 | -16 | 77W | ||||
| 8 | B – 3 | 10 | 52W | ||||
| 9 | G – 4 | 21 | 70W | ||||
| 10 | L – 2 | 36 | 70W | ||||
| 11 | E – 22 | 17 | 29W | ||||
| 12 | C – 2 | 11 | 22W | ||||
| 13 | F – 13 | 14 | 8W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.