Daily Sunspot Evaluation
Observation Sheet Saturday, 11 May 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)
- 138
- Relative number (R)
- 218
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 70 | 13 | 3E | ||||
| 2 | J – 1 | 21 | 59E | ||||
| 3 | J – 1 | 19 | 69E | ||||
| 4 | ? – 3 | -11 | 85E | ||||
| 5 | F – 49 | -27 | 4W | ||||
| 6 | A – 1 | -17 | 20W | ||||
| 7 | B – 12 | -18 | 28W | ||||
| 8 | A – 1 | 14 | 41W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.