Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 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)
- 19
- Relative number (R)
- 69
- Observer
- AK
- Reading
- all checks consistent
- File
- 19511120.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.49 | 78 | |
| 2 | H – 3 | 0.67 | 84 | |
| 3 | C – 10 | 0.29 | 89 | |
| 4 | A – 1 | 0.86 | 264 | |
| 5 | B – 4 | 0.56 | 298 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.