Daily Sunspot Evaluation
Observation Sheet Monday, 23 July 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)
- 5
- Number of spots (f)
- 24
- Relative number (R)
- 74
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510723.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 7 | 0.44 | 105 | |
| 2 | C – 7 | 0.88 | 107 | |
| 3 | J – 2 | 0.18 | 160 | |
| 4 | B – 6 | 0.41 | 240 | |
| 5 | A – 2 | 0.54 | 256 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.