Daily Sunspot Evaluation
Observation Sheet Sunday, 27 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)
- 7
- Number of spots (f)
- 57
- Relative number (R)
- 127
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19800427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 22 | 42W | 241 | 45W | ||
| 2 | AXX – 3 | 8 | 54E | 145 | 51E | 3 | |
| 3 | CSI – 2 | 10 | 61E | 138 | 58E | 1 | |
| 4 | ? – 2 | 6 | 73E | 126 | 70E | 3 | |
| 5 | FKC – 21 | -12 | 40W | 239 | 43W | 145 | |
| 6 | EAI – 12 | -30 | 39W | 238 | 42W | 105 | |
| 7 | FKI – 16 | -16 | 55E | 144 | 52E | 125 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.