Daily Sunspot Evaluation
Observation Sheet Saturday, 25 May 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)
- 8
- Number of spots (f)
- 57
- Relative number (R)
- 137
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19910525.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | 17 | 56W | 143 | 56W | 12.5 | 234 |
| 2 | BRI – 7 | 17 | 15W | 100 | 15W | 4.5 | 243 |
| 3 | BXI – 5 | 4 | 03W | 90 | 03W | 4.5 | 244 |
| 4 | EKI – 22 | 20 | 36E | 51 | 36E | 11.5 | 245 |
| 5 | FAI – 5 | -13 | 62W | 149 | 62W | 15 | 232 |
| 6 | BXI – 11 | -15 | 48W | 135 | 48W | 4.5 | 246 |
| 7 | AX – 1 | -11 | 56E | 31 | 56E | 248 | |
| 8 | CAO – 2 | -15 | 68E | 19 | 68E | 7 | 249 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.