Daily Sunspot Evaluation
Observation Sheet Tuesday, 14 December 1971
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)
- 7
- Number of spots (f)
- 38
- Relative number (R)
- 108
- Observer
- SK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19711214.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 12 | 19 | 31E | 194 | |||
| 2 | J – 1 | 12 | 42E | 183 | |||
| 3 | H – 5 | -15 | 36E | 189 | |||
| 4 | A – 1 | -9 | 03E | 222 | |||
| 5 | ? – 1 | -14 | 18W | 303 ⚠ | |||
| 6 | J – 1 | -3 | 27W | 252 | |||
| 7 | D – 17 | 9 | 19W | 244 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.