Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 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)
- 9
- Number of spots (f)
- 90
- Relative number (R)
- 180
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510710.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.19 | 63 | |
| 2 | C – 20 | 0.63 | 80 | |
| 3 | E – 47 | 0.84 | 104 | |
| 4 | B – 7 | 0.47 | 118 | |
| 5 | A – 3 | 0.55 | 281 | |
| 6 | J – 1 | 0.3 | 302 | |
| 7 | A – 6 | 0.45 | 308 | |
| 8 | C – 4 | 0.02 | 347 | |
| 9 | A – 1 | 0.2 | 355 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.