Daily Sunspot Evaluation
Observation Sheet Thursday, 31 May 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)
- 3
- Number of spots (f)
- 8
- Relative number (R)
- 38
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730531.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -1 | 84W | 104 | 99 | ||
| 2 | G – 5 | 18 | 49W | 69 | 100 | ||
| 3 | A – 2 | 11 | 30W | 50 | 101 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.