Daily Sunspot Evaluation
Observation Sheet Saturday, 10 December 1966
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)
- 4
- Number of spots (f)
- 59
- Relative number (R)
- 99
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19661210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 13 | 27 | 15E | 246 ⚠ | |||
| 2 | D – 10 | 21 | 91E | 117 ⚠ | |||
| 3 | F – 35 | -22 | 10E | 245 ⚠ | |||
| 4 | H – 1 | 8 | 92W | 260 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.