Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 11
- Number of spots (f)
- 64
- Relative number (R)
- 174
- Observer
- MH
- Reading
- all checks consistent
- File
- 19561213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 30 | 5E | ||||
| 2 | A – 1 | -15 | 52E | ||||
| 3 | A – 1 | -23 | 68E | ||||
| 4 | E – 26 | -23 | 1W | ||||
| 5 | A – 1 | -20 | 15W | ||||
| 6 | J – 1 | -16 | 30W | ||||
| 7 | E – 12 | -19 | 42W | ||||
| 8 | J – 1 | -24 | 67W | ||||
| 9 | B – 11 | -10 | 35W | ||||
| 10 | ? – 1 | 24 | 84W | ||||
| 11 | ? – 1 | 29 | 75W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.