Daily Sunspot Evaluation
Observation Sheet Friday, 31 May 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)
- 9
- Number of spots (f)
- 57
- Relative number (R)
- 147
- Observer
- MÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680531.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 5 | 13 | 4E | 357 | |||
| 2 | D – 10 | 10 | 27E | 334 | |||
| 3 | ? – 3 | 16 | 71E | 290 | |||
| 4 | C – 4 | -15 | 52E | 309 | |||
| 5 | H – 3 | -13 | 27E | 334 | |||
| 6 | E – 15 | -35 | 38E | 328 ⚠ | |||
| 7 | D – 11 | -20 | 55W | 56 | |||
| 8 | H – 5 | 25 | 16W | 17 | |||
| 9 | J – 1 | 18 | 6W | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.