Daily Sunspot Evaluation
Observation Sheet Friday, 11 April 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)
- 2
- Number of spots (f)
- 14
- Relative number (R)
- 34
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19970411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 10 | 23 | 38W | 217 | 40W | 4 | 12 |
| 2 | AX – 4 | -30 | 30W | 209 | 32W | 1.5 | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.