Daily Sunspot Evaluation
Observation Sheet Saturday, 18 October 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)
- 13
- Relative number (R)
- 53
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19691018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 11 | 84°E | 89 | |||
| 2 | B – 7 | -30 | 21°W | 194 | |||
| 3 | A – 3 | -4 | 71°W | 244 | |||
| 4 | J – 1 | 10 | 83°W | 256 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.