Daily Sunspot Evaluation
Observation Sheet Thursday, 19 June 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)
- 5
- Number of spots (f)
- 13
- Relative number (R)
- 63
- Observer
- WG
- Reading
- all checks consistent
- File
- 19520619.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.92 | 70 | |
| 2 | J – 1 | 0.6 | 119 | |
| 3 | C – 5 | 0.42 | 211 | |
| 4 | J – 1 | 0.95 | 256 | |
| 5 | B – 4 | 0.31 | 315 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.