Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 December 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)
- 4
- Number of spots (f)
- 16
- Relative number (R)
- 56
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20051221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 19 | 72W | 89 | 74W | ~2 | |
| 2 | HS – 1 | 3 | 42W | 59 | 44W | 1.5 | |
| 3 | HS – 1 | -8 | 76W | 93 | 78W | ~2 | |
| 4 | DSI – 13 | -11 | 24W | 41 | 26W | -10 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.