Daily Sunspot Evaluation
Observation Sheet Saturday, 31 December 1960
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)
- 9
- Number of spots (f)
- 87
- Relative number (R)
- 177
- Observer
- SG
- Reading
- all checks consistent
- File
- 19601231.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 64 | 16 | 8E | ||||
| 2 | B – 7 | -6 | 15E | ||||
| 3 | ? – 1 | -15 | 71E | ||||
| 4 | A – 1 | -12 | 32E | ||||
| 5 | A – 1 | -16 | 46E | ||||
| 6 | J – 3 | -9 | 13W | ||||
| 7 | A – 1 | 10 | 45W | ||||
| 8 | J – 1 | 14 | 55W | ||||
| 9 | B – 8 | 9 | 30W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.