Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 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)
- 16
- Number of spots (f)
- 182
- Relative number (R)
- 342
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 17 | 6 | 6E | ||||
| 2 | H – 7 | 25 | 18E | ||||
| 3 | E – 30 | 33 | 40E | ||||
| 4 | A – 1 | 20 | 36E | ||||
| 5 | A – 3 | 21 | 49E | ||||
| 6 | A – 2 | 27 | 66E | ||||
| 7 | A – 1 | 16 | 39E | ||||
| 8 | A – 1 | 11 | 70E | ||||
| 9 | E – 37 | -16 | 14E | ||||
| 10 | E – 27 | -22 | 25W | ||||
| 11 | E – 24 | -13 | 45W | ||||
| 12 | C – 5 | -7 | 72W | ||||
| 13 | D – 23 | -6 | 40W | ||||
| 14 | J – 1 | -2 | 69W | ||||
| 15 | A – 1 | 19 | 71W | ||||
| 16 | B – 2 | 20 | 51W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.