Daily Sunspot Evaluation
Observation Sheet Friday, 23 August 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)
- 20
- Number of spots (f)
- 143
- Relative number (R)
- 343
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910823.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 24 | 69W | 48 | 72W | - | 436 |
| 2 | AX – 1 | 18 | 18W | 357 | 21W | - | 465 |
| 3 | CAO – 8 | 11 | 17W | 356 | 20W | 6 | 444 |
| 4 | CHI – 9 | 3 | 13W | 352 | 16W | 12 | 449 |
| 5 | CAO – 5 | 17 | 02W | 341 | 05W | 5 | 456 |
| 6 | HA – 1 | 2 | 02W | 341 | 05W | 1.5 | 454 |
| 7 | CAI – 17 | 12 | 03E | 336 | 00 | 7.5 | 455 |
| 8 | BRO – 5 | 9 | 10E | 329 | 07E | 4 | 463 |
| 9 | AX – 2 | 13 | 31E | 308 | 28E | 1 | 460 |
| 10 | BXO – 6 | 12 | 41E | 298 | 38E | 4 | 464 |
| 11 | HA – 1 | -8 | 71W | 50 | 74W | 1.5 | 438 |
| 12 | EKI – 11 | -21 | 65W | 44 | 68W | 14 | 445 |
| 13 | EKC – 37 | -18 | 50W | 29 | 53W | 13 | 440 |
| 14 | CKI – 8 | -9 | 47W | 26 | 50W | 9 | 441 |
| 15 | DKI – 16 | -10 | 34W | 13 | 37W | 8 | 447 |
| 16 | BXO – 2 | -16 | 22W | 1 | 25W | 3 | 452 |
| 17 | CAI – 6 | -27 | 14W | 353 | 17W | 4 | 451 |
| 18 | AX – 1 | -29 | 02E | 337 | 01W | - | 466 |
| 19 | AX – 4 | -10 | 13E | 326 | 10E | 1.5 | 459 |
| 20 | ? – 2 | -10 | 77E | 262 | 74E | 5 | 444 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.