Daily Sunspot Evaluation
Observation Sheet Friday, 4 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)
- 8
- Number of spots (f)
- 47
- Relative number (R)
- 127
- Observer
- FA
- Reading
- all checks consistent
- File
- 19701204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 15 | 14E | 120 | |||
| 2 | ? – 2 | -10 | 78E | 56 | |||
| 3 | C – 6 | -10 | 31E | 103 | |||
| 4 | H – 10 | -12 | 17E | 117 | |||
| 5 | C – 13 | -19 | 05E | 129 | |||
| 6 | A – 4 | -18 | 02W | 136 | |||
| 7 | H – 5 | 16 | 22W | 156 | |||
| 8 | D – 6 | 22 | 07W | 141 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.