Daily Sunspot Evaluation
Observation Sheet Friday, 25 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)
- 7
- Number of spots (f)
- 55
- Relative number (R)
- 125
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510525.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | ? – 2 | 0.97 | 59 | |
| 2 | H – 9 | 0.62 | 104 | |
| 3 | J – 2 | 0.16 | 218 | |
| 4 | B – 8 | 0.61 | 231 | |
| 5 | J – 3 | 0.75 | 233 | |
| 6 | E – 10 | 0.71 | 283 | |
| 7 | E – 21 | 0.59 | 285 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.