Daily Sunspot Evaluation
Observation Sheet Monday, 21 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)
- 9
- Number of spots (f)
- 62
- Relative number (R)
- 152
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19800421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CJO – 3 | 12 | 63W | 341 | 65W | 7 | |
| 2 | DKO – 7 | 23 | 41E | 237 | 39E | 8 | |
| 3 | CAI – 4 | 10 | 48E | 230 | 46E | 3 | |
| 4 | CAO – 6 | 14 | 57E | 241 ⚠ | 55E | 5 | |
| 5 | ? – 1 | -33 | 85W | 3 | 87W | - | |
| 6 | AXX – 3 | -27 | 62W | 340 | 64W | 25 | |
| 7 | ESC – 14 | -17 | 14E | 264 | 12E | 14 | |
| 8 | CAO – 3 | -26 | 23E | 255 | 21E | 3 | |
| 9 | FKI – 21 | -12 | 41E | 237 | 39E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.