Daily Sunspot Evaluation
Observation Sheet Friday, 19 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)
- 3
- Number of spots (f)
- 43
- Relative number (R)
- 73
- Observer
- MH
- Reading
- all checks consistent
- File
- 19521219.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | D – 19 | 0.24 | 133 | |
| 2 | B – 18 | 0.48 | 259 | |
| 3 | H – 6 | 0.25 | 310 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.