Daily Sunspot Evaluation
Observation Sheet Tuesday, 3 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)
- 6
- Number of spots (f)
- 87
- Relative number (R)
- 147
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730403.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 21 | 13 | 27E | 38 | 54 | ||
| 2 | ? – 4 | -13 | 77E | 348 | 58 | ||
| 3 | B – 3 | -14 | 38E | 27 | 56 | ||
| 4 | A – 2 | -13 | 40W | 105 | 57 | ||
| 5 | E – 54 | -5 | 14W | 79 | 52 | ||
| 6 | ? – 3 | 8 | 78W | 143 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.