Daily Sunspot Evaluation
Observation Sheet Friday, 25 April 1980
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)
- 5
- Number of spots (f)
- 38
- Relative number (R)
- 88
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19800425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | 23 | 11W | 237 | 14W | 7.5 | |
| 2 | FKC – 28 | -13 | 13W | 239 | 16W | 14.5 | |
| 3 | DAO – 4 | -31 | 13W | 239 | 16W | 9.5 | |
| 4 | AXX – 1 | -20 | 4SE | 181 | 42E | ||
| 5 | AXX – 1 | -8 | 67E | 159 | 64E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.