Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 June 1952
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)
- 14
- Relative number (R)
- 54
- Observer
- AK
- Reading
- all checks consistent
- File
- 19520617.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 3 | 0.35 | 34 | |
| 2 | J – 2 | 0.86 | 107 | |
| 3 | D – 7 | 0.42 | 134 | |
| 4 | J – 2 | 0.72 | 253 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.