Daily Sunspot Evaluation
Observation Sheet Thursday, 25 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)
- 2
- Number of spots (f)
- 22
- Relative number (R)
- 42
- Observer
- NA
- Reading
- all checks consistent
- File
- 19971225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HH – 1 | 20 | 62E | 309 | 60E | 3 | 116 |
| 2 | EAC – 21 | -22 | 22E | 349 | 20E | 12.5 | 114 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.