Daily Sunspot Evaluation
Observation Sheet Thursday, 10 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)
- 20
- Relative number (R)
- 40
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19970410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 18 | 23 | 24W | 217 | 27W | 5 | 12 |
| 2 | AX – 2 | 9 | 22W | 215 | 25W | 0.5 | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.