Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 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)
- 27
- Relative number (R)
- 67
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730619.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -3 | 79E | 51 | 416 | ||
| 2 | H – 7 | -7 | 64E | 64 | 417 | ||
| 3 | B – 4 | -9 | 07E | 121 | 419 | ||
| 4 | C – 15 | 12 | 22W | 150 | 441 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.