Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 March 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)
- 8
- Number of spots (f)
- 101
- Relative number (R)
- 181
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 14 | 7E | ||||
| 2 | D – 24 | 13 | 15E | ||||
| 3 | A – 2 | 15 | 65E | ||||
| 4 | ? – 3 | 11 | 77E | ||||
| 5 | C – 12 | -17 | 66W | ||||
| 6 | B – 9 | 22 | 45W | ||||
| 7 | ? – 6 | 32 | 65W | ||||
| 8 | E – 44 | 13 | 2W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.