Daily Sunspot Evaluation
Observation Sheet Sunday, 18 September 2005
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)
- 23
- Relative number (R)
- 53
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20050918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 2 | 12 | 09E | 168 | 06E | 0.5 | |
| 2 | ? – 6 | 10 | 75E | 102 | 72E | ~9 | |
| 3 | EKI – 15 | -11 | 54W | 231 | 57W | 10.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.