Daily Sunspot Evaluation
Observation Sheet Saturday, 25 April 1992
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)
- 52
- Relative number (R)
- 132
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 10 | 8 | 11W | 343 | 10W | 6.5 | 173 |
| 2 | CAO – 7 | 10 | 18E | 314 | 13E | 4.5 | 177 |
| 3 | CAO – 6 | 8 | 60E | 222 ⚠ | 61E | 4.5 | 178 |
| 4 | FAO – 2 | -26 | 71W | 43 | 70W | 16 | 161 |
| 5 | CAO – 12 | -18 | 34W | 7 | 34W | 16.5 | 167 |
| 6 | HA – 7 | -18 | 18W | 360 ⚠ | 17W | 3.5 | 163 |
| 7 | AX – 1 | -22 | 19E | 313 | 20E | - | 174 |
| 8 | CAO – 7 | -5 | 47E | 285 | 48E | 8 | 176 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.