Daily Sunspot Evaluation
Observation Sheet Sunday, 9 December 1956
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)
- 10
- Number of spots (f)
- 60
- Relative number (R)
- 160
- Observer
- MH
- Reading
- all checks consistent
- File
- 19561209.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 2 | 28 | 58 | |
| 2 | B – 2 | -11 | 39 | |
| 3 | C – 8 | -25 | 51 | |
| 4 | C – 2 | -16 | 18 | |
| 5 | C – 7 | -20 | 18 | |
| 6 | F – 21 | -19 | 5 | |
| 7 | H – 1 | -25 | 16 | |
| 8 | B – 7 | -17 | 53 | |
| 9 | ? – 1 | 24 | 75 | |
| 10 | E – 9 | 26 | 22 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.