Daily Sunspot Evaluation
Observation Sheet Sunday, 9 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)
- 98
- Relative number (R)
- 218
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 24 | 13E | ||||
| 2 | A – 5 | 20 | 49E | ||||
| 3 | A – 1 | 12 | 45E | ||||
| 4 | H – 3 | 12 | 53E | ||||
| 5 | B – 3 | -16 | 9E | ||||
| 6 | E – 38 | -20 | 0 | ||||
| 7 | H – 13 | -14 | 16W | ||||
| 8 | C – 20 | -13 | 46W | ||||
| 9 | ? – 1 | -17 | 77W | ||||
| 10 | A – 2 | 7 | 65W | ||||
| 11 | A – 2 | 28 | 55W | ||||
| 12 | C – 7 | 18 | 72W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.