Daily Sunspot Evaluation
Observation Sheet Thursday, 5 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)
- 9
- Number of spots (f)
- 80
- Relative number (R)
- 170
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910905.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKI – 13 | 24 | 67W | 234 | 70W | 7 | |
| 2 | CAO – 6 | 12 | 61W | 228 | 64W | 9 | 479 |
| 3 | FAI – 27 | -20 | 37W | 204 | 40W | 19 | 477 |
| 4 | AR – 2 | -7 | 30W | 197 | 33W | 2.5 | 489 |
| 5 | BXO – 6 | -8 | 23W | 190 | 26W | 3.5 | 482 |
| 6 | AX – 6 | -23 | 23W | 190 | 26W | 3 | 483 |
| 7 | BRI – 18 | -12 | 16W | 183 | 19W | 6 | 490 |
| 8 | AX – 1 | -26 | 31E | 136 | 28E | - | 491 |
| 9 | HS – 1 | -26 | 65E | 102 | 62E | 2.5 | 492 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.