Daily Sunspot Evaluation
Observation Sheet Sunday, 22 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)
- 53
- Relative number (R)
- 143
- Observer
- SM
- Reading
- all checks consistent
- File
- 19681222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 14 | 38E | 134 | |||
| 2 | E – 9 | 18 | 75E | 97 | |||
| 3 | J – 5 | -6 | 25E | 147 | |||
| 4 | J – 1 | -24 | 60E | 112 | |||
| 5 | J – 1 | -28 | 86E | 86 | |||
| 6 | A – 2 | -23 | 12W | 184 | |||
| 7 | C – 16 | -19 | 37W | 209 | |||
| 8 | B – 6 | -22 | 59W | 231 | |||
| 9 | B – 5 | -10 | 51W | 223 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.