Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 June 1961
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)
- 59
- Relative number (R)
- 129
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 23 | 34E | ||||
| 2 | D – 9 | 12 | 45E | ||||
| 3 | H – 4 | -6 | 10E | ||||
| 4 | H – 11 | -12 | 30W | ||||
| 5 | G – 2 | -11 | 64W | ||||
| 6 | H – 2 | 4 | 67W | ||||
| 7 | E – 24 | 13 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.