Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 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)
- 8
- Number of spots (f)
- 63
- Relative number (R)
- 143
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 15 | 46E | ||||
| 2 | E – 21 | -20 | 22E | ||||
| 3 | C – 7 | -19 | 12W | ||||
| 4 | D – 12 | -27 | 39W | ||||
| 5 | A – 1 | -20 | 31W | ||||
| 6 | B – 2 | -24 | 62W | ||||
| 7 | E – 7 | 22 | 58W | ||||
| 8 | D – 11 | 26 | 44W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.