Daily Sunspot Evaluation
Observation Sheet Friday, 5 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)
- 7
- Number of spots (f)
- 16
- Relative number (R)
- 86
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570405.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 2 | 21 | 5E | ||||
| 2 | C – 4 | 10 | 23E | ||||
| 3 | C – 4 | -20 | 35E | ||||
| 4 | G – 3 | -23 | 2E | ||||
| 5 | J – 1 | -23 | 28W | ||||
| 6 | A – 1 | 16 | 62W | ||||
| 7 | A – 1 | 24 | 59W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.