Daily Sunspot Evaluation
Observation Sheet Thursday, 11 September 1997
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)
- 69
- Relative number (R)
- 99
- Observer
- NA
- Reading
- all checks consistent
- File
- 19970911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 19 | 22 | 03W | 319 | 06W | 11.5 | 7-3 |
| 2 | DKC – 25 | -28 | 39W | 355 | 42W | 10 | 7-2 |
| 3 | FHC – 25 | -26 | 23E | 293 | 20E | 19 | 7-4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.