Daily Sunspot Evaluation
Observation Sheet Friday, 28 October 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)
- 9
- Number of spots (f)
- 81
- Relative number (R)
- 171
- Observer
- FY
- Reading
- all checks consistent
- File
- 19551028.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.39 | 3 | |
| 2 | E – 18 | 0.48 | 54 | |
| 3 | A – 1 | 0.72 | 82 | |
| 4 | ? – 1 | 0.39 | 94 | |
| 5 | C – 19 | 0.68 | 160 | |
| 6 | E – 23 | 0.48 | 188 | |
| 7 | C – 15 | 0.61 | 319 | |
| 8 | A – 1 | 0.46 | 340 | |
| 9 | A – 1 | 0.22 | 348 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.