Daily Sunspot Evaluation
Observation Sheet Saturday, 13 November 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)
- 5
- Number of spots (f)
- 9
- Relative number (R)
- 59
- Observer
- FA
- Reading
- all checks consistent
- File
- 19711113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 7 | 56E | 218 | |||
| 2 | ? – 1 | -13 | 83E | 191 | |||
| 3 | A – 1 | -14 | 13E | 261 | |||
| 4 | A – 1 | -7 | 21W | 295 | |||
| 5 | A – 1 | -3 | 21W | 295 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.