Daily Sunspot Evaluation
Observation Sheet Sunday, 18 September 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)
- 4
- Number of spots (f)
- 19
- Relative number (R)
- 59
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 2 | 16 | 69W | 112 | 72W | 2 | 293 |
| 2 | ? – 2 | 294 | |||||
| 3 | DSI – 13 | -12 | 20W | 63 | 23W | 7 | 288 |
| 4 | HAX – 2 | -10 | 67E | 336 | 64E | 2 | 292 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.