Daily Sunspot Evaluation
Observation Sheet Sunday, 23 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)
- 12
- Number of spots (f)
- 107
- Relative number (R)
- 227
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570623.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 10E | |||||
| 2 | B – 2 | 15E | |||||
| 3 | J – 2 | 13E | |||||
| 4 | F – 27 | 26E | |||||
| 5 | F – 29 | 26W | |||||
| 6 | C – 2 | 50W | |||||
| 7 | A – 2 | 60W | |||||
| 8 | A – 2 | 48W | |||||
| 9 | B – 2 | 19W | |||||
| 10 | A – 1 | 20W | |||||
| 11 | F – 30 | 10W | |||||
| 12 | A – 3 | 9W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.