Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 February 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)
- 13
- Number of spots (f)
- 52
- Relative number (R)
- 182
- Observer
- MH
- Reading
- all checks consistent
- File
- 19560228.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 5 | 0.62 | 17 | |
| 2 | A – 4 | 0.93 | 40 | |
| 3 | D – 7 | 0.79 | 84 | |
| 4 | B – 7 | 0.94 | 91 | |
| 5 | C – 5 | 0.35 | 131 | |
| 6 | B – 4 | 0.38 | 164 | |
| 7 | B – 2 | 0.33 | 174 | |
| 8 | B – 2 | 0.39 | 180 | |
| 9 | D – 6 | 0.59 | 216 | |
| 10 | B – 2 | 0.72 | 216 | |
| 11 | A – 2 | 0.87 | 229 | |
| 12 | C – 3 | 0.78 | 288 | |
| 13 | A – 3 | 0.64 | 302 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.