Daily Sunspot Evaluation
Observation Sheet Saturday, 11 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)
- 5
- Number of spots (f)
- 79
- Relative number (R)
- 129
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510811.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 16 | 0.58 | 136 | |
| 2 | H – 5 | 0.4 | 250 | |
| 3 | J – 4 | 0.4 | 289 | |
| 4 | B – 15 | 0.86 | 290 | |
| 5 | D – 39 | 0.15 | 304 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.