Daily Sunspot Evaluation
Observation Sheet Friday, 23 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)
- 3
- Number of spots (f)
- 17
- Relative number (R)
- 47
- Observer
- HM
- Reading
- all checks consistent
- File
- 19830923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 2 | -9 | 01E | 336 | 02W | 05 | 292 |
| 2 | AXX – 4 | -17 | 38E | 299 | 36E | 2 | 295 |
| 3 | DKO – 11 | -22 | 68E | 269 | 65E | 13.5 | 296 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.