Daily Sunspot Evaluation
Observation Sheet Monday, 12 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)
- 15
- Number of spots (f)
- 93
- Relative number (R)
- 243
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 10 | 63E | ||||
| 2 | C – 15 | -8 | 21E | ||||
| 3 | A – 1 | -6 | 10E | ||||
| 4 | E – 33 | -19 | 42E | ||||
| 5 | A – 1 | -22 | 65E | ||||
| 6 | ? – 1 | -24 | 85E | ||||
| 7 | A – 1 | -20 | 23E | ||||
| 8 | B – 3 | -14 | 4E | ||||
| 9 | A – 1 | -9 | 23W | ||||
| 10 | ? – 3 | 2 | 78W | ||||
| 11 | ? – 1 | 11 | 73W | ||||
| 12 | B – 3 | 12 | 54W | ||||
| 13 | C – 21 | 8 | 38W | ||||
| 14 | ? – 3 | 26 | 67W | ||||
| 15 | H – 5 | 14 | 28W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.