Daily Sunspot Evaluation
Observation Sheet Sunday, 11 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)
- 5
- Number of spots (f)
- 33
- Relative number (R)
- 83
- Observer
- TS
- Reading
- all checks consistent
- File
- 19830911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRI – 7 | 3 | 12E | 123 | 09E | 4.5E | 283/2 |
| 2 | BRI – 8 | -8 | 44W | 179 | 47W | 65 | 295 |
| 3 | BXO – 7 | -9 | 15W | 150 | 18W | 2.5 | 277 |
| 4 | BXI – 4 | -23 | 03W | 138 | 06W | 3 | 280 |
| 5 | AXX – 7 | -2 | 13E | 122 | 10E | 25 | 286 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.