Daily Sunspot Evaluation
Observation Sheet Friday, 4 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)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19730504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -11 | 55E | 349 ⚠ | 80 | ||
| 2 | E – 33 | -13 | 39E | 335 | 78 | ||
| 3 | A – 2 | -13 | 75E | 299 | 79 | ||
| 4 | A – 3 | -11 | 74W | 88 | 77 | ||
| 5 | A – 1 | -5 | 77W | 91 | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.