Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 May 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)
- 14
- Number of spots (f)
- 105
- Relative number (R)
- 245
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 12 | 7E | ||||
| 2 | ? – 2 | -6 | 85E | ||||
| 3 | ? – 2 | -23 | 70E | ||||
| 4 | E – 49 | -13 | 28E | ||||
| 5 | B – 9 | -9 | 10E | ||||
| 6 | C – 8 | -7 | 4E | ||||
| 7 | A – 1 | -5 | 3W | ||||
| 8 | B – 6 | -8 | 37W | ||||
| 9 | ? – 1 | 11 | 87W | ||||
| 10 | C – 17 | 8 | 52W | ||||
| 11 | A – 1 | 13 | 62W | ||||
| 12 | H – 5 | 14 | 41W | ||||
| 13 | ? – 2 | 27 | 82W | ||||
| 14 | A – 1 | 13 | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.