Daily Sunspot Evaluation
Observation Sheet Saturday, 25 February 1961
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)
- 4
- Number of spots (f)
- 25
- Relative number (R)
- 65
- Observer
- AB
- Reading
- all checks consistent
- File
- 19610225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 7 | 22E | ||||
| 2 | C – 7 | -12 | 11E | ||||
| 3 | C – 11 | -11 | 19W | ||||
| 4 | C – 6 | -14 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.