Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 July 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)
- 14
- Relative number (R)
- 64
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510725.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 5 | 0.6 | 114 | |
| 2 | A – 2 | 0.35 | 127 | |
| 3 | G – 4 | 0.08 | 195 | |
| 4 | J – 2 | 0.4 | 255 | |
| 5 | A – 1 | 0.27 | 300 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.