Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 15
- Number of spots (f)
- 66
- Relative number (R)
- 216
- Observer
- FY
- Reading
- all checks consistent
- File
- 19561215.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | ? – 6 | 14 | 28 | |
| 2 | ? – 4 | -24 | 28 | |
| 3 | A – 1 | -16 | 25 | |
| 4 | B – 4 | -28 | 25 | |
| 5 | E – 32 | -25 | 28 | |
| 6 | A – 1 | -21 | 45 | |
| 7 | A – 1 | -17 | 38 | |
| 8 | E – 3 | -21 | 68 | |
| 9 | A – 1 | -18 | 57 | |
| 10 | ? – 1 | -16 | 85 | |
| 11 | A – 3 | -13 | 65 | |
| 12 | A – 1 | -10 | 43 | |
| 13 | J – 3 | 23 | 39 | |
| 14 | J – 4 | 27 | 25 | |
| 15 | J – 1 | 29 | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.