Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 3
- Number of spots (f)
- 48
- Relative number (R)
- 78
- Observer
- ET
- Reading
- all checks consistent
- File
- 19520113.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 3 | 0.32 | 25 | |
| 2 | G – 41 | 0.5 | 64 | |
| 3 | B – 4 | 0.36 | 304 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.