Daily Sunspot Evaluation
Observation Sheet Friday, 17 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)
- 9
- Number of spots (f)
- 33
- Relative number (R)
- 123
- Observer
- MH
- Reading
- all checks consistent
- File
- 19600617.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 17 | 16E | ||||
| 2 | J – 3 | 23 | 43E | ||||
| 3 | C – 2 | 13 | 53E | ||||
| 4 | A – 1 | 8 | 62E | ||||
| 5 | A – 1 | -15 | 62E | ||||
| 6 | D – 7 | -12 | 21W | ||||
| 7 | A – 2 | -10 | 36W | ||||
| 8 | A – 2 | 14 | 72W | ||||
| 9 | E – 14 | 22 | 43W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.