Daily Sunspot Evaluation
Observation Sheet Monday, 15 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)
- 8
- Number of spots (f)
- 72
- Relative number (R)
- 152
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19690915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 17 | 14 | 13E | 235 | |||
| 2 | A – 1 | 1 | 80E | 168 | |||
| 3 | D – 18 | -5 | 30E | 218 | |||
| 4 | A – 1 | -18 | 65E | 183 | |||
| 5 | C – 15 | -9 | 04E | 244 | |||
| 6 | H – 5 | -18 | 02E | 246 | |||
| 7 | ? – 1 | -35 | 68W | 316 | |||
| 8 | B – 14 | 7 | 13W | 261 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.