Daily Sunspot Evaluation
Observation Sheet Monday, 22 July 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)
- 18
- Number of spots (f)
- 228
- Relative number (R)
- 408
- Observer
- YÖ
- Reading
- all checks consistent
- File
- 19570722.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 21 | 30 | 1E | ||||
| 2 | B – 31 | 31 | 24E | ||||
| 3 | F – 36 | 10 | 51E | ||||
| 4 | H – 34 | -23 | 8E | ||||
| 5 | A – 1 | -34 | 20W | ||||
| 6 | A – 1 | -44 | 29W | ||||
| 7 | A – 1 | -36 | 40W | ||||
| 8 | C – 20 | -18 | 36W | ||||
| 9 | H – 13 | -9 | 34W | ||||
| 10 | B – 3 | -11 | 47W | ||||
| 11 | J – 1 | -17 | 65W | ||||
| 12 | A – 1 | -14 | 74W | ||||
| 13 | B – 3 | 12 | 51W | ||||
| 14 | H – 9 | 14 | 40W | ||||
| 15 | H – 39 | 24 | 23W | ||||
| 16 | B – 3 | 26 | 13W | ||||
| 17 | H – 3 | 28 | 8W | ||||
| 18 | B – 8 | 9 | 2E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.