Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 January 1956
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)
- 9
- Number of spots (f)
- 80
- Relative number (R)
- 170
- Observer
- MH
- Reading
- all checks consistent
- File
- 19560117.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 30 | 0.65 | 30 | |
| 2 | H – 3 | 0.63 | 36 | |
| 3 | F – 37 | 0.74 | 51 | |
| 4 | ? – 1 | 0.97 | 57 | |
| 5 | ? – 1 | 0.99 | 59 | |
| 6 | C – 5 | 0.57 | 218 | |
| 7 | A – 1 | 0.88 | 238 | |
| 8 | A – 1 | 0.94 | 241 | |
| 9 | J – 1 | 0.93 | 292 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.