Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 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)
- 71
- Relative number (R)
- 161
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 20 | 10 | 38W | 301 | 4W | 6.5 | 521 |
| 2 | BRI – 18 | 11 | 14W | 277 | 17W | 6 | 537 |
| 3 | BXO – 2 | 6 | 02E | 261 | 01W | 4 | 523 |
| 4 | AX – 1 | 26 | 39E | 224 | 36E | 538 | |
| 5 | ? – 5 | -12 | 80W | 343 | 83W | 7 | 526 |
| 6 | CAO – 11 | -10 | 08E | 255 | 05E | 8.5 | 529 |
| 7 | BXO – 2 | -20 | 56E | 209 | 58E | 4 | 535 |
| 8 | DAO – 4 | -7 | 61E | 202 | 58E | 6.5 | 536 |
| 9 | ? – 8 | -12 | 82E | 182 | 79E | 15 | 539 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.