Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 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)
- 13
- Number of spots (f)
- 87
- Relative number (R)
- 217
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 7 | 31 | 42E | ||||
| 2 | ? – 3 | 6 | 79E | ||||
| 3 | A – 8 | -25 | 71E | ||||
| 4 | E – 20 | -14 | 1E | ||||
| 5 | B – 4 | -33 | 7E | ||||
| 6 | D – 7 | -25 | 26W | ||||
| 7 | E – 15 | -21 | 50W | ||||
| 8 | D – 6 | -12 | 20W | ||||
| 9 | G – 9 | -14 | +1W | ||||
| 10 | A – 1 | -9 | 37W | ||||
| 11 | A – 3 | -5 | 66W | ||||
| 12 | A – 2 | -6 | 32W | ||||
| 13 | B – 2 | 23 | 29W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.