Daily Sunspot Evaluation
Observation Sheet Thursday, 25 September 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)
- 7
- Number of spots (f)
- 56
- Relative number (R)
- 126
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 12 | 31E | 85 | |||
| 2 | H – 3 | 11 | 53E | 63 | |||
| 3 | D – 13 | 7 | 26E | 90 | |||
| 4 | B – 6 | 5 | 08E | 108 | |||
| 5 | H – 6 | -14 | 34E | 82 | |||
| 6 | D – 11 | -10 | 16E | 100 | |||
| 7 | E – 12 | 5 | 35W | 151 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.