Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 September 2005
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)
- 76
- Relative number (R)
- 106
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20050913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 10 | 02E | 241 | 00 | ~1 | |
| 2 | HS – 2 | 11 | 11E | 232 | 09E | ~1 | |
| 3 | FKC – 73 | -9 | 13E | 230 | 11E | ~75.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.