Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 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)
- 6
- Number of spots (f)
- 58
- Relative number (R)
- 118
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510410.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 3 | 0.54 | 58 | |
| 2 | B – 10 | 0.25 | 78 | |
| 3 | C – 9 | 0.08 | 138 | |
| 4 | C – 10 | 0.46 | 237 | |
| 5 | E – 25 | 0.82 | 265 | |
| 6 | A – 1 | 0.49 | 284 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.