Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 August 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)
- 42
- Relative number (R)
- 112
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510807.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.29 | 48 | |
| 2 | C – 7 | 0.72 | 94 | |
| 3 | D – 9 | 0.56 | 99 | |
| 4 | J – 1 | 0.58 | 124 | |
| 5 | B – 4 | 0.63 | 127 | |
| 6 | A – 1 | 0.33 | 283 | |
| 7 | D – 19 | 0.12 | 318 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.