Daily Sunspot Evaluation
Observation Sheet Tuesday, 3 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)
- 11
- Number of spots (f)
- 173
- Relative number (R)
- 283
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910903.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 24 | 25 | 44W | 237 | 47W | 14 | 469 |
| 2 | CAI – 22 | 12 | 33W | 226 | 36W | 8 | 479 |
| 3 | AX – 1 | 4 | 30W | 223 | 33W | - | 486 |
| 4 | HA – 1 | -9 | 76W | 269 | 79W | 1.5 | 441 |
| 5 | CAI – 31 | -6 | 54W | 247 | 57W | 11.5 | 475 |
| 6 | AX – 1 | 0 | 39W | 232 | 42W | - | 487 |
| 7 | AX – 1 | -8 | 20W | 213 | 23W | - | 488 |
| 8 | FKO – 57 | -20 | 11W | 204 | 14W | 17.5 | 477 |
| 9 | BRI – 20 | -8 | 01E | 192 | 01W | 6 | 482 |
| 10 | BXO – 12 | -23 | 03E | 190 | 00 | 5 | 483 |
| 11 | AX – 3 | -10 | 55E | 138 | 52E | 1 | 485 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.