Daily Sunspot Evaluation
Observation Sheet Wednesday, 24 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)
- 14
- Number of spots (f)
- 71
- Relative number (R)
- 211
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570424.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 6 | 25 | 19E | ||||
| 2 | J – 1 | -4 | 78E | ||||
| 3 | C – 2 | -10 | 53E | ||||
| 4 | ? – 1 | -11 | 80E | ||||
| 5 | A – 1 | -18 | 75E | ||||
| 6 | D – 13 | -18 | 53E | ||||
| 7 | B – 3 | -14 | 18E | ||||
| 8 | C – 6 | -25 | 23E | ||||
| 9 | G – 10 | -15 | 1W | ||||
| 10 | C – 4 | -15 | 21W | ||||
| 11 | D – 15 | -11 | 21W | ||||
| 12 | J – 1 | -18 | 59W | ||||
| 13 | J – 1 | -14 | 46W | ||||
| 14 | C – 7 | 29 | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.