Daily Sunspot Evaluation
Observation Sheet Thursday, 25 September 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)
- 89
- Relative number (R)
- 209
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 28 | 15E | ||||
| 2 | A – 2 | 18 | 42E | ||||
| 3 | D – 4 | 19 | 52E | ||||
| 4 | ? – 1 | 10 | 76E | ||||
| 5 | C – 14 | -9 | 61E | ||||
| 6 | E – 10 | -5 | 20E | ||||
| 7 | B – 5 | -23 | 58E | ||||
| 8 | G – 6 | -18 | 40E | ||||
| 9 | B – 6 | -11 | 4W | ||||
| 10 | ? – 6 | -17 | 75W | ||||
| 11 | B – 14 | 22 | 66W | ||||
| 12 | C – 20 | 30 | 76W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.