Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 December 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)
- 44
- Relative number (R)
- 84
- Observer
- AK
- Reading
- all checks consistent
- File
- 19521217.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | H – 8 | 0.27 | 76 | |
| 2 | E – 15 | 0.61 | 114 | |
| 3 | C – 14 | 0.15 | 206 | |
| 4 | B – 7 | 0.83 | 305 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.