Daily Sunspot Evaluation
Observation Sheet Tuesday, 22 July 1958
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)
- 17
- Number of spots (f)
- 102
- Relative number (R)
- 272
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580722.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 20 | 10E | ||||
| 2 | A – 1 | 18 | 67E | ||||
| 3 | J – 3 | 15 | 47E | ||||
| 4 | B – 2 | 5 | 62E | ||||
| 5 | J – 1 | -4 | 48E | ||||
| 6 | F – 18 | -17 | 62E | ||||
| 7 | H – 2 | -18 | 44E | ||||
| 8 | C – 11 | -15 | 15E | ||||
| 9 | B – 15 | -12 | 2E | ||||
| 10 | A – 1 | -21 | 47W | ||||
| 11 | A – 3 | -18 | 67W | ||||
| 12 | A – 3 | -13 | 75W | ||||
| 13 | J – 1 | -4 | 46W | ||||
| 14 | A – 1 | 8 | 32W | ||||
| 15 | E – 25 | 8 | 52W | ||||
| 16 | B – 10 | 21 | 21W | ||||
| 17 | A – 3 | 18 | 13WE |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.