Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 December 1973
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)
- 30
- Relative number (R)
- 70
- Observer
- HM
- Reading
- all checks consistent
- File
- 19731225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 15 | 222 | |||||
| 2 | D – 10 | 221 | |||||
| 3 | B – 4 | 225 | |||||
| 4 | A – 1 | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.