Daily Sunspot Evaluation
Observation Sheet Friday, 6 September 1991
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)
- 8
- Number of spots (f)
- 90
- Relative number (R)
- 170
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910906.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 8 | 24 | 80W | 234 | 83W | 5 | 416 |
| 2 | BXI – 4 | 11 | 76W | 230 | 79W | 10 | 479 |
| 3 | FKI – 32 | -20 | 50W | 204 | 53W | 19 | 477 |
| 4 | AX – 6 | -23 | 36W | 190 | 39W | 2 | 413 |
| 5 | DKC – 32 | -12 | 29W | 183 | 32W | 9.5 | 430 |
| 6 | BXO – 3 | -25 | 17E | 137 | 14E | 5 | 431 |
| 7 | BXO – 4 | -11 | 38E | 116 | 35E | 3 | 413 |
| 8 | HS – 1 | -25 | 51E | 103 | 48E | 2 | 432 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.