Daily Sunspot Evaluation
Observation Sheet Saturday, 15 February 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)
- 13
- Number of spots (f)
- 62
- Relative number (R)
- 192
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580215.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | D – 4 | |||
| 2 | J – 3 | |||
| 3 | A – 2 | |||
| 4 | ? – 6 | |||
| 5 | C – 6 | |||
| 6 | A – 2 | |||
| 7 | ? – 1 | |||
| 8 | A – 1 | |||
| 9 | ? – 3 | |||
| 10 | C – 6 | |||
| 11 | ? – 1 | |||
| 12 | E – 25 | |||
| 13 | A – 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.