Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 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)
- 4
- Number of spots (f)
- 55
- Relative number (R)
- 95
- Observer
- NA
- Reading
- all checks consistent
- File
- 19970909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | 21 | 21W | 3 | 24W | 8 | 21 |
| 2 | DAI – 17 | 22 | 23E | 319 | 20E | 7 | 22 |
| 3 | DKC – 18 | -28 | 13W | 355 | 16W | 9.5 | 22 |
| 4 | EHS – 16 | -26 | 50E | 292 | 47E | 19 | 24 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.