Daily Sunspot Evaluation
Observation Sheet Sunday, 18 April 1982
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)
- 20
- Relative number (R)
- 110
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19820418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 2 | 16 | 77W | 120 | 80W | 1.5 | 159 |
| 2 | HXX – 1 | 12 | 75W | 118 | 78W | 2 | 149 |
| 3 | AXX – 1 | 3 | 64W | 107 | 67W | 153 | |
| 4 | AXX – 1 | 18 | 37W | 80 | 40W | 0.5 | 158 |
| 5 | HHX – 1 | 4 | 17E | 26 | 14E | 2.75 | 163 |
| 6 | HAX – 2 | -26 | 58W | 101 | 61W | 1.75 | 151 |
| 7 | HSX – 1 | -8 | 33W | 76 | 36W | 2.25 | 160 |
| 8 | DAO – 10 | -17 | 10W | 53 | 13W | 3 | 167 |
| 9 | HAX – 1 | -14 | 70E | 333 | 67E | 2 | 170 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.