Daily Sunspot Evaluation
Observation Sheet Friday, 26 July 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)
- 10
- Number of spots (f)
- 117
- Relative number (R)
- 217
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570726.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 53 | 10 | 1E | ||||
| 2 | B – 12 | 21 | 6E | ||||
| 3 | H – 2 | -13 | 41E | ||||
| 4 | ? – 1 | -29 | 76E | ||||
| 5 | D – 14 | -24 | 45W | ||||
| 6 | A – 1 | 15 | 66W | ||||
| 7 | ? – 1 | 22 | 72W | ||||
| 8 | J – 2 | 27 | 62W | ||||
| 9 | J – 3 | 30 | 49W | ||||
| 10 | E – 28 | 32 | 29W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.