Daily Sunspot Evaluation
Observation Sheet Friday, 31 August 1990
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)
- 80
- Relative number (R)
- 200
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19900831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 38 | 14 | 23W | 34 | 26W | 13.5 | 396 |
| 2 | AX – 1 | 14 | 08W | 19 | 11W | - | 400 |
| 3 | HS – 1 | 16 | 41E | 330 | 38E | 2 | 401 |
| 4 | CAI – 6 | 13 | 55E | 316 | 52E | 4 | 405 |
| 5 | CAO – 8 | -7 | 63W | 74 | 66W | 10 | 399 |
| 6 | CAI – 7 | -26 | 53W | 64 | 56W | 9 | 389 |
| 7 | AX – 1 | -11 | 19W | 30 | 22W | - | 406 |
| 8 | BXI – 7 | -16 | 23E | 348 | 20E | 6 | 403 |
| 9 | CAO – 4 | -21 | 30E | 341 | 27E | 6 | 404 |
| 10 | HA – 5 | -13 | 33E | 338 | 30E | 7 | 402 |
| 11 | AX – 1 | -14 | 47E | 324 | 44E | - | 407 |
| 12 | AR – 1 | -13 | 62E | 309 | 59E | 1 | 408 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.