Daily Sunspot Evaluation
Observation Sheet Thursday, 26 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)
- 5
- Number of spots (f)
- 59
- Relative number (R)
- 109
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510426.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 5 | 0.64 | 69 | |
| 2 | ? – 1 | 0.95 | 75 | |
| 3 | E – 37 | 0.39 | 215 | |
| 4 | A – 1 | 0.19 | 272 | |
| 5 | D – 15 | 0.37 | 337 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.