Daily Sunspot Evaluation
Observation Sheet Thursday, 18 September 2003
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)
- 5
- Number of spots (f)
- 28
- Relative number (R)
- 78
- Observer
- MS
- Reading
- all checks consistent
- File
- 20030918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 14 | 13 | 56W | 161 | 59W | 8.5 | 258 |
| 2 | CAO – 4 | 18 | 47E | 58 | 44E | 11 | 257 |
| 3 | HS – 1 | 9 | 68E | 37 | 65E | 2 | 260 |
| 4 | HA – 4 | -10 | 50W | 155 | 53W | 3 | 259 |
| 5 | DAO – 5 | -10 | 04W | 109 | 07W | 4 | 256 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.