Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 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)
- 6
- Relative number (R)
- 36
- Observer
- MS
- Reading
- all checks consistent
- File
- 20050420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 2 | 34W | 48 | 37W | 2.25 | |
| 2 | AX – 1 | 0 | 25W | 39 | 28W | - | |
| 3 | PRO – 3 | -11 | 45E | 329 | 42E | 3.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.