Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 December 1960
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)
- 9
- Number of spots (f)
- 31
- Relative number (R)
- 121
- Observer
- SG
- Reading
- all checks consistent
- File
- 19601207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 9 | 1E | ||||
| 2 | C – 10 | 27 | 40E | ||||
| 3 | ? – 1 | 5 | 85E | ||||
| 4 | ? – 1 | -12 | 80E | ||||
| 5 | H – 7 | -14 | 26E | ||||
| 6 | A – 3 | -9 | 28W | ||||
| 7 | H – 5 | -7 | 50W | ||||
| 8 | A – 1 | 12 | 70W | ||||
| 9 | A – 2 | 18 | 49W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.