Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 June 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)
- 25
- Relative number (R)
- 65
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 7 | -3 | 64E | 50 | 418 | ||
| 2 | E – 8 | -7 | 49E | 65 | 419 | ||
| 3 | ? – 1 | -12 | 75E | 39 | 420 | ||
| 4 | C – 9 | 12 | 37W | 151 | 444 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.