Daily Sunspot Evaluation
Observation Sheet Tuesday, 8 April 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)
- 18
- Number of spots (f)
- 127
- Relative number (R)
- 307
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 42 | 25E | ||||
| 2 | A – 1 | 45 | 38E | ||||
| 3 | F – 31 | 14 | 14E | ||||
| 4 | A – 1 | 7 | 18E | ||||
| 5 | C – 3 | 12 | 73E | ||||
| 6 | A – 2 | -13 | 59E | ||||
| 7 | C – 5 | -13 | 8E | ||||
| 8 | C – 2 | -25 | 64W | ||||
| 9 | C – 3 | -16 | 50W | ||||
| 10 | ? – 1 | -16 | 81W | ||||
| 11 | ? – 1 | 27 | 73W | ||||
| 12 | A – 2 | 11 | 24W | ||||
| 13 | B – 10 | 22 | 44W | ||||
| 14 | J – 1 | 24 | 36W | ||||
| 15 | E – 19 | 33 | 50W | ||||
| 16 | B – 2 | 27 | 27W | ||||
| 17 | F – 41 | 17 | 4W | ||||
| 18 | A – 1 | 12 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.