Daily Sunspot Evaluation
Observation Sheet Saturday, 10 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)
- 45
- Relative number (R)
- 135
- Observer
- AB
- Reading
- all checks consistent
- File
- 19601210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 6 | 31 | 3E | ||||
| 2 | J – 1 | 27 | 6E | ||||
| 3 | B – 9 | 14 | 50E | ||||
| 4 | J – 3 | 6 | 42E | ||||
| 5 | C – 5 | -8 | 31E | ||||
| 6 | J – 2 | -13 | 38E | ||||
| 7 | J – 8 | -15 | 15W | ||||
| 8 | B – 6 | -10 | 73W | ||||
| 9 | B – 5 | 10 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.