Daily Sunspot Evaluation
Observation Sheet Thursday, 9 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)
- 106
- Relative number (R)
- 166
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510809.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 4 | 0.05 | 90 | |
| 2 | C – 37 | 0.27 | 92 | |
| 3 | C – 17 | 0.86 | 122 | |
| 4 | J – 2 | 0.25 | 164 | |
| 5 | B – 11 | 0.3 | 169 | |
| 6 | D – 35 | 0.55 | 289 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.