Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 August 1953
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)
- 6
- Relative number (R)
- 46
- Observer
- WG
- Reading
- all checks consistent
- File
- 19530818.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.39 | 257 | |
| 2 | J – 1 | 0.71 | 293 | |
| 3 | H – 2 | 0.36 | 302 | |
| 4 | A – 2 | 0.21 | 310 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.