Daily Sunspot Evaluation
Observation Sheet Monday, 18 August 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)
- 4
- Number of spots (f)
- 14
- Relative number (R)
- 54
- Observer
- MH
- Reading
- all checks consistent
- File
- 19520818.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.8 | 128 | |
| 2 | ? – 5 | 0.96 | 278 | |
| 3 | J – 1 | 0.86 | 299 | |
| 4 | B – 7 | 0.35 | 312 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.