Daily Sunspot Evaluation
Observation Sheet Friday, 9 November 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)
- 31
- Relative number (R)
- 81
- Observer
- ET
- Reading
- all checks consistent
- File
- 19511109.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.12 | 26 | |
| 2 | A – 4 | 0.57 | 101 | |
| 3 | A – 1 | 0.72 | 129 | |
| 4 | C – 16 | 0.34 | 143 | |
| 5 | H – 9 | 0.31 | 180 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.