Daily Sunspot Evaluation
Observation Sheet Friday, 12 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)
- 2
- Number of spots (f)
- 20
- Relative number (R)
- 40
- Observer
- MS
- Reading
- all checks consistent
- File
- 20030912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 19 | -7 | 40W | 222 | 40W | 9 | 253 |
| 2 | HR – 1 | -12 | 18W | 200 | 18W | 0.5 | 254 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.