Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 June 1960
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)
- 28
- Relative number (R)
- 78
- Observer
- ET
- Reading
- all checks consistent
- File
- 19600621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 12 | 7E | ||||
| 2 | H – 6 | 20 | 59E | ||||
| 3 | A – 1 | 1 | 75E | ||||
| 4 | D – 7 | -12 | 74W | ||||
| 5 | B – 7 | 22 | 6W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.