Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 June 1957
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)
- 14
- Number of spots (f)
- 121
- Relative number (R)
- 261
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570619.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 28 | 31 | |
| 2 | J – 1 | 29 | 56 | |
| 3 | F – 38 | 19 | 41 | |
| 4 | J – 1 | 22 | 64 | |
| 5 | ? – 5 | -20 | 76 | |
| 6 | B – 2 | -12 | 23 | |
| 7 | F – 34 | -37 | 22 | |
| 8 | A – 2 | -20 | 8 | |
| 9 | D – 12 | -14 | 2 | |
| 10 | C – 11 | -16 | 9 | |
| 11 | B – 5 | -16 | 19 | |
| 12 | A – 1 | -12 | 43 | |
| 13 | A – 1 | 30 | 52 | |
| 14 | D – 7 | 33 | 60 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.