Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 December 1970
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)
- 47
- Relative number (R)
- 87
- Observer
- MA
- Reading
- all checks consistent
- File
- 19701209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 21 | 16 | 35°E | 34 | |||
| 2 | ? – 11 | 14 | 66°E | 3 | |||
| 3 | C – 12 | -10 | 15°E | 54 | |||
| 4 | H – 3 | -11 | 50°W | 119 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.