Daily Sunspot Evaluation
Observation Sheet Monday, 6 September 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)
- 44
- Relative number (R)
- 94
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19710906.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 12E | 79 | |||
| 2 | A – 4 | -5 | 18W | 103 ⚠ | |||
| 3 | E – 27 | -7 | 30W | 121 | |||
| 4 | D – 7 | 2 | 38W | 129 | |||
| 5 | D – 5 | 17 | 08W | 93 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.