Daily Sunspot Evaluation
Observation Sheet Sunday, 8 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)
- 7
- Number of spots (f)
- 49
- Relative number (R)
- 119
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 20 | -8 | 36E | 323 | 62 | ||
| 2 | A – 2 | -10 | 24E | 335 | 63 | ||
| 3 | J – 3 | -14 | 18E | 341 | 64 | ||
| 4 | C – 7 | -13 | 08E | 351 | 58 | ||
| 5 | C – 10 | -8 | 01W | 0 | 61 | ||
| 6 | ? – 1 | -5 | 86W | 85 | 52 | ||
| 7 | H – 6 | 12 | 41W | 40 | 54 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.