Daily Sunspot Evaluation
Observation Sheet Friday, 7 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)
- 12
- Number of spots (f)
- 130
- Relative number (R)
- 250
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | 19 | 11E | ||||
| 2 | C – 7 | 26 | 35E | ||||
| 3 | ? – 1 | 20 | 76E | ||||
| 4 | ? – 1 | 12 | 83E | ||||
| 5 | A – 2 | -14 | 60E | ||||
| 6 | F – 78 | -15 | 23E | ||||
| 7 | B – 3 | -20 | 10E | ||||
| 8 | A – 1 | -12 | 5W | ||||
| 9 | C – 28 | -13 | 16W | ||||
| 10 | B – 2 | 9 | 53W | ||||
| 11 | A – 1 | 11 | 43W | ||||
| 12 | A – 2 | 27 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.