Daily Sunspot Evaluation
Observation Sheet Monday, 20 September 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)
- 2
- Number of spots (f)
- 17
- Relative number (R)
- 37
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20040920.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | 5 | 62W | 350 | 65W | 7.5 | 165 |
| 2 | DKI – 13 | -12 | 18E | 270 | 15E | 10 | 168 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.