Daily Sunspot Evaluation
Observation Sheet Thursday, 7 June 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)
- 87
- Relative number (R)
- 147
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510607.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 9 | 0.84 | 58 | |
| 2 | J – 2 | 0.94 | 62 | |
| 3 | G – 19 | 0.86 | 65 | |
| 4 | J – 5 | 0.78 | 67 | |
| 5 | C – 12 | 0.21 | 135 | |
| 6 | D – 40 | 0.13 | 165 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.