Daily Sunspot Evaluation
Observation Sheet Saturday, 20 December 1958
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)
- 6
- Number of spots (f)
- 56
- Relative number (R)
- 116
- Observer
- AB
- Reading
- all checks consistent
- File
- 19581220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | 18 | 40E | ||||
| 2 | A – 3 | 12 | 64E | ||||
| 3 | C – 5 | -23 | 57E | ||||
| 4 | D – 15 | -17 | 16E | ||||
| 5 | A – 2 | -19 | 62W | ||||
| 6 | E – 27 | 21 | 42W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.