Daily Sunspot Evaluation
Observation Sheet Monday, 18 August 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)
- 24
- Relative number (R)
- 64
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19690818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -18 | 15E | 243 | |||
| 2 | B – 20 | -13 | 06E | 252 | |||
| 3 | J – 1 | 10 | 30W | 288 | |||
| 4 | A – 1 | 13 | 66W | 324 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.