Daily Sunspot Evaluation
Observation Sheet Saturday, 12 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)
- 8
- Number of spots (f)
- 77
- Relative number (R)
- 157
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510512.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.31 | 36 | |
| 2 | F – 47 | 0.76 | 49 | |
| 3 | J – 2 | 0.9 | 54 | |
| 4 | J – 3 | 0.84 | 59 | |
| 5 | B – 9 | 0.85 | 66 | |
| 6 | A – 1 | 0.29 | 80 | |
| 7 | B – 8 | 0.14 | 180 | |
| 8 | B – 6 | 0.48 | 225 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.