Daily Sunspot Evaluation
Observation Sheet Thursday, 5 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)
- 5
- Number of spots (f)
- 39
- Relative number (R)
- 89
- Observer
- SK
- Reading
- all checks consistent
- File
- 19730405.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 8 | 12 | 00 | 39 | 59 | ||
| 2 | A – 1 | -7 | 43E | 356 | 60 | ||
| 3 | G – 7 | -13 | 52E | 347 | 58 | ||
| 4 | E – 22 | -5 | 41W | 80 | 52 | ||
| 5 | A – 1 | -4 | 70W | 109 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.