Daily Sunspot Evaluation
Observation Sheet Friday, 12 February 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)
- 65
- Relative number (R)
- 155
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 11 | 11 | 36E | ||||
| 2 | A – 1 | 9 | 6SE | ||||
| 3 | C – 7 | -25 | 36E | ||||
| 4 | C – 9 | -20 | 5E | ||||
| 5 | ? – 1 | -24 | 84W | ||||
| 6 | ? – 4 | -14 | 32W | ||||
| 7 | G – 3 | 1 | 58W | ||||
| 8 | G – 2 | 16 | 50W | ||||
| 9 | E – 27 | 22 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.