Daily Sunspot Evaluation
Observation Sheet Sunday, 18 July 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)
- 7
- Number of spots (f)
- 113
- Relative number (R)
- 183
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20040718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 9 | 12 | 27W | 80 | 29W | 4 | 131 |
| 2 | FKI – 18 | 8 | 69E | 344 | 67E | ~17 | 141 |
| 3 | HS – 4 | -6 | 76W | 129 | 78W | ~2.5 | 126 |
| 4 | AX – 1 | -11 | 02W | 55 | 04W | - | 140 |
| 5 | BXO – 3 | -16 | 80 | 53 | 02W | ~6 | 138 |
| 6 | FKI – 69 | -10 | 11E | 42 | 09E | ~19 | 139 |
| 7 | DAC – 9 | -13 | 70E | 343 | 68E | ~7 | 142 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.