Daily Sunspot Evaluation
Observation Sheet Monday, 15 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)
- 5
- Number of spots (f)
- 35
- Relative number (R)
- 85
- Observer
- ET
- Reading
- all checks consistent
- File
- 19521215.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | H – 6 | 0.65 | 91 | |
| 2 | D – 14 | 0.5 | 112 | |
| 3 | C – 4 | 0.62 | 118 | |
| 4 | C – 10 | 0.46 | 123 | |
| 5 | J – 1 | 0.5 | 230 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.