Daily Sunspot Evaluation
Observation Sheet Sunday, 17 June 1956
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)
- 6
- Number of spots (f)
- 55
- Relative number (R)
- 115
- Observer
- WG
- Reading
- all checks consistent
- File
- 19560617.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 12 | 0.59 | 48 | |
| 2 | D – 13 | 0.76 | 106 | |
| 3 | J – 1 | 0.56 | 134 | |
| 4 | C – 6 | 0.35 | 333 | |
| 5 | D – 18 | 0.5 | 350 | |
| 6 | C – 5 | 0.39 | 351 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.