Daily Sunspot Evaluation
Observation Sheet Friday, 28 June 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)
- 4
- Number of spots (f)
- 62
- Relative number (R)
- 102
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680628.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 8 | -14 | 19W | 9 | |||
| 2 | D – 17 | -15 | 34W | 24 | |||
| 3 | H – 18 | 12 | 19W | 9 | |||
| 4 | D – 19 | 28 | 3W | 353 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.