Daily Sunspot Evaluation
Observation Sheet Tuesday, 26 February 1957
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)
- 51
- Relative number (R)
- 131
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570226.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 18 | 9E | ||||
| 2 | E – 19 | 31 | 25E | ||||
| 3 | A – 2 | -8 | 7W | ||||
| 4 | D – 9 | -35 | 66W | ||||
| 5 | J – 1 | -28 | 69W | ||||
| 6 | B – 5 | 17 | 50W | ||||
| 7 | A – 2 | 19 | 29W | ||||
| 8 | G – 8 | 14 | 14W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.