Daily Sunspot Evaluation
Observation Sheet Monday, 28 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)
- 8
- Number of spots (f)
- 59
- Relative number (R)
- 139
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 12 | 28E | 159 | 25E | ||
| 2 | AXX – 1 | 7 | 39E | 148 | 36E | ||
| 3 | CSI – 4 | 11 | 47E | 140 | 44E | 2.5 | |
| 4 | HSX – 1 | 6 | 59E | 128 | 56E | 1 | |
| 5 | ? – 1 | 11 | 78E | 109 | 75E | 4 | |
| 6 | FKC – 17 | -12 | 54W | 241 | 58W | 17 | |
| 7 | FKC – 8 | -31 | 52W | 239 | 55W | 12 | |
| 8 | FKC – 26 | -16 | 41E | 146 | 38E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.