Daily Sunspot Evaluation
Observation Sheet Saturday, 11 September 1999
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)
- 61
- Relative number (R)
- 111
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 37 | 14 | 16E | 26 | 13E | 6.5 | |
| 2 | HS – 6 | 12 | 34E | 8 | 31E | 3.5 | |
| 3 | HS – 1 | 19 | 7E | 331 ⚠ | 68E | 4.5 | |
| 4 | EAE – 16 | -26 | 34E | 8 | 31E | 10.5 | Eki-16 |
| 5 | ? – 1 | -17 | 74E | 328 | 71E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.