Daily Sunspot Evaluation
Observation Sheet Sunday, 28 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)
- 154
- Relative number (R)
- 274
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | 18 | 11E | ||||
| 2 | D – 28 | 28 | 41E | ||||
| 3 | C – 19 | 9 | 34E | ||||
| 4 | C – 8 | -14 | 47E | ||||
| 5 | B – 8 | -6 | 16E | ||||
| 6 | E – 30 | -11 | 24E | ||||
| 7 | C – 15 | -22 | 16E | ||||
| 8 | D – 9 | -10 | 5E | ||||
| 9 | G – 8 | -18 | 0 | ||||
| 10 | G – 5 | -8 | 20W | ||||
| 11 | C – 9 | 14 | 39W | ||||
| 12 | C – 6 | 30 | 53W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.