Daily Sunspot Evaluation
Observation Sheet Thursday, 11 December 1997
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)
- 5
- Number of spots (f)
- 28
- Relative number (R)
- 78
- Observer
- NA
- Reading
- all checks consistent
- File
- 19971211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 2 | 26 | 60W | 253 | 60W | 6 | 109 |
| 2 | HS – 2 | 26 | 35W | 228 | 35W | 2 | 106 104 |
| 3 | DSC – 12 | 32 | 31W | 224 | 31W | 8 | 103 108 |
| 4 | DAC – 10 | 30 | 00 | 193 | 00 | 5 | 110 1045 |
| 5 | HS – 2 | -38 | 04E | 189 | 04E | 2 | 111 140 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.