Daily Sunspot Evaluation
Observation Sheet Friday, 20 June 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)
- 36
- Relative number (R)
- 106
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | 9 | 05E | 313 | |||
| 2 | A – 1 | 11 | 69E | 249 | |||
| 3 | A – 1 | -15 | 07W | 325 | |||
| 4 | A – 3 | 3 | 07W | 325 | |||
| 5 | A – 1 | 8 | 35W | 353 | |||
| 6 | F – 22 | 10 | 09W | 327 | |||
| 7 | B – 2 | 24 | 68W | 26 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.