Daily Sunspot Evaluation
Observation Sheet Monday, 15 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)
- 7
- Number of spots (f)
- 75
- Relative number (R)
- 145
- Observer
- SG
- Reading
- all checks consistent
- File
- 19581215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | 12 | 1E | ||||
| 2 | E – 15 | 22 | 25E | ||||
| 3 | B – 2 | 15 | 48E | ||||
| 4 | E – 19 | -18 | 23W | ||||
| 5 | F – 27 | -5 | 47W | ||||
| 6 | ? – 1 | 13 | 80W | ||||
| 7 | D – 7 | -8 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.