Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 February 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)
- 10
- Number of spots (f)
- 76
- Relative number (R)
- 176
- Observer
- FY
- Reading
- all checks consistent
- File
- 19580211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | 9 | 9E | ||||
| 2 | A – 1 | 18 | 23E | ||||
| 3 | E – 17 | 11 | 26E | ||||
| 4 | A – 1 | -25 | 70E | ||||
| 5 | A – 2 | -16 | 14W | ||||
| 6 | E – 28 | -20 | 25W | ||||
| 7 | H – 3 | -14 | 42W | ||||
| 8 | ? – 5 | -13 | 25W | ||||
| 9 | A – 1 | 19 | 46W | ||||
| 10 | C – 12 | 25 | 14W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.