Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 3
- Number of spots (f)
- 23
- Relative number (R)
- 53
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20030913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 16 | -7 | 50W | 220 | 52W | ~9 | 253 |
| 2 | HS – 1 | -12 | 28W | 198 | 30W | - | 254 |
| 3 | HS – 6 | -8 | 23W | 193 | 25W | 3 | 255 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.