Daily Sunspot Evaluation
Observation Sheet Friday, 17 September 2004
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)
- 55
- Relative number (R)
- 75
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20040917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAC – 37 | 5 | 20W | 348 | 23W | ~11.5 | 465 |
| 2 | EKC – 18 | -12 | 59E | 269 | 56E | 13 | 468 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.