Daily Sunspot Evaluation
Observation Sheet Monday, 28 May 1951
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)
- 6
- Number of spots (f)
- 53
- Relative number (R)
- 113
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510528.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | H – 13 | 0.66 | 51 | |
| 2 | H – 13 | 0.33 | 176 | |
| 3 | A – 1 | 0.22 | 240 | |
| 4 | ? – 3 | 0.9 | 241 | |
| 5 | J – 3 | 0.73 | 245 | |
| 6 | ? – 20 | 0.94 | 273 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.