Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 9
- Number of spots (f)
- 37
- Relative number (R)
- 127
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680613.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | 9 | 19E | 170 | |||
| 2 | ? – 1 | -15 | 75E | 114 | |||
| 3 | J – 3 | -31 | 61E | 128 | |||
| 4 | F – 13 | -15 | 7E | 182 | |||
| 5 | A – 1 | -14 | 61W | 250 | |||
| 6 | D – 5 | 11 | 50W | 239 | |||
| 7 | C – 3 | 22 | 45W | 234 | |||
| 8 | A – 1 | 30 | 52W | 241 | |||
| 9 | J – 1 | 16 | 15W | 204 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.