Daily Sunspot Evaluation
Observation Sheet Friday, 3 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)
- 4
- Number of spots (f)
- 49
- Relative number (R)
- 89
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510803.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 8 | 0.37 | 74 | |
| 2 | C – 18 | 0.74 | 94 | |
| 3 | C – 12 | 0.46 | 246 | |
| 4 | J – 11 | 0.91 | 276 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.