Daily Sunspot Evaluation
Observation Sheet Monday, 19 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)
- 161
- Relative number (R)
- 361
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19910819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 24 | 15W | 41 ⚠ | 18W | 1 | 436 |
| 2 | BXO – 4 | 8 | 29E | 3 | 26E | 2.5 | 453 |
| 3 | HA – 3 | 11 | 34E | 358 | 31E | 2.5 | 444 |
| 4 | CAI – 5 | 2 | 39E | 353 | 36E | 9.5 | 449 |
| 5 | CAI – 8 | 17 | 51E | 341 | 48 | 5 | 450 |
| 6 | HA – 1 | 2 | 52E | 340 | 48E | 1.5 | 454 |
| 7 | DAC – 11 | 11 | 55E | 331 ⚠ | 52E | 8 | 455 |
| 8 | ? – 1 | -24 | 82W | 114 | 85W | 4 | 451 |
| 9 | BRO – 3 | -9 | 36W | 68 | 39W | 2.5 | 457 |
| 10 | HA – 2 | -9 | 17W | 49 | 20W | 2.5 | 438 |
| 11 | EAO – 13 | -20 | 11W | 48 ⚠ | 14W | 13.5 | 446 |
| 12 | DKI – 40 | -17 | 03E | 29 | 00 | 10 | 440 |
| 13 | DKI – 17 | -10 | 05E | 21 ⚠ | 02E | 8.5 | 441 |
| 14 | EAC – 30 | -9 | 20E | 12 | 11E | 15 | 447 |
| 15 | HA – 1 | -4 | 21E | 5 ⚠ | 24E | 1 | 448 |
| 16 | CAO – 5 | -17 | 32E | 0 | 29E | 5.5 | 452 |
| 17 | HA – 2 | -26 | 34E | 358 | 31E | 2.5 | 451 |
| 18 | BXI – 8 | -13 | 34E | 358 | 31E | 4.5 | 450 |
| 19 | AX – 5 | -18 | 39E | 353 | 36E | 2 | 458 |
| 20 | AX – 1 | -10 | 68E | 324 | 65E | 1 | 459 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.