Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 February 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)
- 8
- Relative number (R)
- 58
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510207.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.83 | 58 | |
| 2 | A – 4 | 0.79 | 78 | |
| 3 | A – 1 | 0.58 | 237 | |
| 4 | A – 1 | 0.73 | 244 | |
| 5 | J – 1 | 0.82 | 246 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.