Daily Sunspot Evaluation
Observation Sheet Tuesday, 24 April 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)
- 52
- Relative number (R)
- 92
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730424.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 14 | -6 | 59E | 87 | 70 | ||
| 2 | A – 1 | -11 | 62E | 84 | 72 | ||
| 3 | C – 5 | -16 | 40W | 186 | 69 | ||
| 4 | E – 32 | 11 | 03W | 149 | 68 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.