Daily Sunspot Evaluation
Observation Sheet Monday, 15 September 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)
- 3
- Number of spots (f)
- 47
- Relative number (R)
- 77
- Observer
- NA
- Reading
- all checks consistent
- File
- 19970915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAI – 15 | 23 | 57W | 320 | 60W | 13.5 | 23 |
| 2 | DSC – 18 | 17 | 34E | 226 | 34E | 9.5 | 25 |
| 3 | FKI – 14 | -26 | 29W | 292 | 32W | 18 | 24 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.