Daily Sunspot Evaluation
Observation Sheet Saturday, 18 December 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)
- 3
- Number of spots (f)
- 7
- Relative number (R)
- 37
- Observer
- TG
- Reading
- all checks consistent
- File
- 20041218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -7 | 81W | 275 | 83W | ~4 | 216 |
| 2 | DRO – 5 | -9 | 46E | 148 | 44E | 3.5 | 218 |
| 3 | HA – 1 | -10 | 67E | 127 | 65E | 2 | 219 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.