Daily Sunspot Evaluation
Observation Sheet Saturday, 20 July 1968
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)
- 25
- Relative number (R)
- 95
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 4 | 18 | 62E | 356 | |||
| 2 | D – 7 | 10 | 52E | 6 | |||
| 3 | A – 2 | -17 | 51E | 7 | |||
| 4 | H – 2 | -17 | 22E | 54 ⚠ | |||
| 5 | A – 1 | -19 | 04E | 36 ⚠ | |||
| 6 | H – 1 | -13 | 52W | 110 | |||
| 7 | H – 8 | 13 | 34W | 92 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.