Daily Sunspot Evaluation
Observation Sheet Monday, 2 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)
- 12
- Number of spots (f)
- 102
- Relative number (R)
- 222
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19910902.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 15 | 76W | 281 | 77W | 1.5 | 468 |
| 2 | DAO – 19 | 25 | 32W | 237 | 33W | 13 | 469 |
| 3 | AX – 2 | 19 | 29W | 234 | 30W | 2 | 480 |
| 4 | DAI – 12 | 12 | 22W | 227 | 23W | 4.5 | 479 |
| 5 | BXO – 2 | 12 | 09W | 214 | 10W | 2.5 | 481 |
| 6 | HA – 1 | -9 | 63W | 268 | 64W | 1.5 | 467 |
| 7 | BRI – 19 | -6 | 41W | 246 | 42W | 11.5 | 475 |
| 8 | FKO – 23 | -19 | 01E | 204 | 00 | 19 | 477 |
| 9 | DAI – 10 | -8 | 13E | 192 | 12E | 4.5 | 482 |
| 10 | CAO – 10 | -22 | 16E | 189 | 15E | 5 | 483 |
| 11 | AX – 1 | -13 | 23E | 182 | 22E | 484 | |
| 12 | AX – 2 | -10 | 67E | 138 | 66E | 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.