Daily Sunspot Evaluation
Observation Sheet Saturday, 9 April 1983
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)
- 3
- Number of spots (f)
- 37
- Relative number (R)
- 67
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 18 | -10 | 16W | 41 | 19W | 11 | 82 |
| 2 | DAI – 17 | -17 | 27E | 358 | 24E | 65 | 89E |
| 3 | HAX – 2 | -9 | 44E | 341 | 41E | 125 | 85 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.