Daily Sunspot Evaluation
Observation Sheet Sunday, 17 September 2006
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)
- 2
- Number of spots (f)
- 2
- Relative number (R)
- 22
- Observer
- SA
- Reading
- all checks consistent
- File
- 20060917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | -13 | 81W | 133 | 83W | 23 | |
| 2 | HA – 1 | -8 | 78E | 334 | 76E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.