Daily Sunspot Evaluation
Observation Sheet Sunday, 25 February 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)
- 16
- Relative number (R)
- 56
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 11 | 7 | 56E | 137 | 36 | ||
| 2 | A – 1 | -18 | 66W | 259 | 33 | ||
| 3 | ? – 1 | -10 | 83W | 276 | 38 | ||
| 4 | A – 3 | 6 | 01W | 194 | 37 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.