Daily Sunspot Evaluation
Observation Sheet Monday, 18 February 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)
- 39
- Relative number (R)
- 69
- Observer
- WG
- Reading
- all checks consistent
- File
- 19520218.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 2 | 0.46 | 9 | |
| 2 | B – 2 | 0.71 | 84 | |
| 3 | E – 35 | 0.12 | 110 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.