Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 June 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)
- 80
- Relative number (R)
- 130
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510619.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | H – 4 | 0.72 | 61 | |
| 2 | J – 1 | 0.92 | 104 | |
| 3 | E – 65 | 0.31 | 210 | |
| 4 | ? – 1 | 0.98 | 269 | |
| 5 | C – 9 | 0.27 | 335 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.