Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 July 1952
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)
- 70
- Relative number (R)
- 140
- Observer
- WG
- Reading
- all checks consistent
- File
- 19520715.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.12 | 20 | |
| 2 | A – 2 | 0.58 | 76 | |
| 3 | B – 3 | 0.42 | 120 | |
| 4 | F – 53 | 0.12 | 189 | |
| 5 | C – 5 | 0.52 | 239 | |
| 6 | A – 1 | 0.5 | 248 | |
| 7 | H – 4 | 0.15 | 322 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.