Daily Sunspot Evaluation
Observation Sheet Monday, 19 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)
- 17
- Relative number (R)
- 57
- Observer
- HM
- Reading
- all checks consistent
- File
- 19830919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 2 | 17 | 83W | 112 | 86W | 4 | 293 |
| 2 | AXX – 1 | -5 | 59W | 88 | 62W | 0.5 | 294 |
| 3 | DAX – 11 | -12 | 33W | 62 | 36W | 7.5 | 288 |
| 4 | HAX – 3 | 0 | 55E | 334 | 52E | 2.5 | 292 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.