Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 8
- Number of spots (f)
- 81
- Relative number (R)
- 161
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570615.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | -16 | 57E | ||||
| 2 | A – 5 | -16 | 34E | ||||
| 3 | A – 4 | -21 | 50E | ||||
| 4 | ? – 7 | -37 | 75E | ||||
| 5 | C – 3 | -10 | 22W | ||||
| 6 | ? – 2 | -28 | 74W | ||||
| 7 | C – 7 | 13 | 32W | ||||
| 8 | E – 49 | 33 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.