Daily Sunspot Evaluation
Observation Sheet Thursday, 15 December 1955
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)
- 59
- Relative number (R)
- 109
- Observer
- AK
- Reading
- all checks consistent
- File
- 19551215.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 20 | 0.45 | 44 | |
| 2 | C – 8 | 0.59 | 55 | |
| 3 | B – 12 | 0.73 | 63 | |
| 4 | C – 7 | 0.84 | 138 | |
| 5 | C – 12 | 0.9 | 311 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.