Daily Sunspot Evaluation
Observation Sheet Wednesday, 3 April 1957
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)
- 10
- Number of spots (f)
- 47
- Relative number (R)
- 147
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570403.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 4 | 9 | 50E | ||||
| 2 | J – 3 | -20 | 60E | ||||
| 3 | C – 11 | -22 | 27E | ||||
| 4 | B – 2 | -22 | 4E | ||||
| 5 | A – 2 | -12 | 5W | ||||
| 6 | E – 16 | -16 | 62W | ||||
| 7 | C – 3 | 13 | 54W | ||||
| 8 | A – 1 | 14 | 38W | ||||
| 9 | J – 2 | 26 | 64W | ||||
| 10 | J – 3 | 28 | 55W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.