Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 January 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)
- 5
- Number of spots (f)
- 23
- Relative number (R)
- 73
- Observer
- ET
- Reading
- all checks consistent
- File
- 19520109.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.9 | 74 | |
| 2 | ? – 4 | 0.98 | 81 | |
| 3 | A – 3 | 0.61 | 248 | |
| 4 | A – 1 | 0.69 | 270 | |
| 5 | C – 14 | 0.5 | 299 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.