Daily Sunspot Evaluation
Observation Sheet Friday, 25 July 1969
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)
- 17
- Relative number (R)
- 57
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690725.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 10 | 04E | 210 | |||
| 2 | C – 6 | -16 | 62E | 152 | |||
| 3 | A – 1 | -17 | 28E | 186 | |||
| 4 | B – 8 | 13 | 25W | 239 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.