Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 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)
- 3
- Number of spots (f)
- 15
- Relative number (R)
- 45
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20051220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 19 | 59W | 89 | 61W | ~2 | |
| 2 | HA – 1 | -7 | 63W | 93 | 65W | 1 | |
| 3 | DAO – 13 | -10 | 10W | 40 | 12W | ~8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.