Daily Sunspot Evaluation
Observation Sheet Sunday, 12 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)
- 6
- Number of spots (f)
- 54
- Relative number (R)
- 114
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510812.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 18 | 0.43 | 153 | |
| 2 | H – 5 | 0.58 | 263 | |
| 3 | C – 4 | 0.6 | 289 | |
| 4 | D – 22 | 0.4 | 293 | |
| 5 | ? – 4 | 0.95 | 293 | |
| 6 | A – 1 | 0.85 | 304 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.