Daily Sunspot Evaluation
Observation Sheet Saturday, 21 December 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)
- 34
- Relative number (R)
- 124
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19681221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 13 | 50E | 133 | |||
| 2 | ? – 2 | 17 | 81E | 102 | |||
| 3 | J – 1 | -6 | 36E | 147 | |||
| 4 | ? – 1 | -24 | 71E | 112 | |||
| 5 | D – 16 | -19 | 27W | 210 | |||
| 6 | B – 4 | -22 | 48W | 231 | |||
| 7 | B – 5 | -11 | 40W | 223 | |||
| 8 | A – 1 | 16 | 78W | 261 | |||
| 9 | A – 1 | 30 | 37W | 220 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.