Daily Sunspot Evaluation
Observation Sheet Saturday, 14 April 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)
- 4
- Number of spots (f)
- 75
- Relative number (R)
- 115
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510414.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | F – 35 | 0.87 | 45 | |
| 2 | D – 34 | 0.65 | 67 | |
| 3 | C – 4 | 0.78 | 236 | |
| 4 | A – 2 | 0.56 | 238 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.