Daily Sunspot Evaluation
Observation Sheet Saturday, 7 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)
- 7
- Number of spots (f)
- 27
- Relative number (R)
- 97
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510707.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.14 | 42 | |
| 2 | C – 12 | 0.45 | 69 | |
| 3 | ? – 3 | 0.98 | 82 | |
| 4 | J – 1 | 0.62 | 88 | |
| 5 | J – 3 | 0.93 | 101 | |
| 6 | ? – 2 | 0.97 | 275 | |
| 7 | B – 5 | 0.82 | 280 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.