Daily Sunspot Evaluation
Observation Sheet Monday, 23 September 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)
- 10
- Number of spots (f)
- 54
- Relative number (R)
- 154
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 21 | 17 | 28°E | 252 | |||
| 2 | A – 3 | 17 | 49°E | 231 | |||
| 3 | A – 1 | 14 | 41°E | 239 | |||
| 4 | ? – 2 | 18 | 82°E | 198 | |||
| 5 | ? – 4 | 12 | 80°E | 200 | |||
| 6 | C – 15 | 2 | 06°E | 274 | |||
| 7 | C – 5 | -17 | 24°E | 256 | |||
| 8 | A – 1 | -12 | 18°W | 298 | |||
| 9 | A – 1 | -9 | 33°W | 313 | |||
| 10 | J – 1 | 18 | 17°W | 307 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.