Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 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)
- 13
- Number of spots (f)
- 89
- Relative number (R)
- 219
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 3 | 85W | 358 | 88W | - | 440 |
| 2 | ? – 1 | 11 | 85W | 358 | 88W | - | 444 |
| 3 | AX – 1 | 16 | 71W | 344 | 74W | - | 456 |
| 4 | HA – 1 | 10 | 63W | 336 | 66W | 1.5 | 455 |
| 5 | AX – 1 | 9 | 59W | 332 | 62W | - | 463 |
| 6 | CSO – 6 | 16 | 04W | 277 | 07W | 7 | 468 |
| 7 | EKC – 33 | 24 | 34E | 239 | 31E | 14 | 469 |
| 8 | HS – 1 | -9 | 07E | 266 | 04E | 2 | 467 |
| 9 | CAO – 11 | -12 | 18E | 255 | 15E | 6 | 472 |
| 10 | HA – 3 | -16 | 25E | 248 | 22E | 3 | 470 |
| 11 | BRI – 20 | -9 | 30E | 243 | 27E | 7 | 475 |
| 12 | AX – 3 | -17 | 36E | 237 | 33E | 0.5 | 478 |
| 13 | ? – 7 | -20 | 70E | 203 | 67E | 20 | 477 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.