Daily Sunspot Evaluation
Observation Sheet Friday, 11 May 1951
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)
- 6
- Number of spots (f)
- 47
- Relative number (R)
- 107
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510511.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.5 | 48 | |
| 2 | F – 26 | 0.88 | 51 | |
| 3 | ? – 2 | 0.96 | 60 | |
| 4 | ? – 3 | 0.94 | 67 | |
| 5 | B – 7 | 0.22 | 106 | |
| 6 | B – 8 | 0.31 | 212 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.