Daily Sunspot Evaluation
Observation Sheet Thursday, 25 February 1960
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)
- 57
- Relative number (R)
- 137
- Observer
- AB
- Reading
- all checks consistent
- File
- 19600225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 23 | 7 | 7E | ||||
| 2 | C – 5 | 12 | 34E | ||||
| 3 | C – 9 | 7 | 29E | ||||
| 4 | J – 4 | -18 | 53E | ||||
| 5 | C – 6 | -22 | 5W | ||||
| 6 | A – 3 | -7 | 27W | ||||
| 7 | A – 2 | 23 | 41W | ||||
| 8 | B – 5 | 12 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.