Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 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)
- 6
- Number of spots (f)
- 29
- Relative number (R)
- 89
- Observer
- SM
- Reading
- all checks consistent
- File
- 19681218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 30 | 06E | 219 | |||
| 2 | J – 1 | -6 | 82E | 143 | |||
| 3 | D – 7 | -26 | 15E | 210 | |||
| 4 | B – 8 | -22 | 05W | 230 | |||
| 5 | J – 3 | -32 | 66W | 291 | |||
| 6 | D – 5 | 22 | 74W | 299 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.