Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 April 2005
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)
- 12
- Relative number (R)
- 42
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20050412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 4 | 2 | 78E | 41 | 76E | 7 | |
| 2 | CSI – 7 | -8 | 05W | 124 | 07W | √3 | |
| 3 | AX – 1 | -4 | 04W | 123 | 06W | — |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.