Daily Sunspot Evaluation
Observation Sheet Friday, 21 April 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)
- 1
- Number of spots (f)
- 4
- Relative number (R)
- 14
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20060421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | -2 | 18W | 240 | 26W | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.