Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 11
- Number of spots (f)
- 60
- Relative number (R)
- 170
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 40 | 44E | ||||
| 2 | J – 2 | 16 | 24E | ||||
| 3 | J – 3 | 8 | 66E | ||||
| 4 | C – 3 | -4 | 77E | ||||
| 5 | J – 1 | -21 | 72E | ||||
| 6 | A – 1 | -6 | 17E | ||||
| 7 | B – 6 | -13 | 1WE | ||||
| 8 | H – 22 | -22 | 2W | ||||
| 9 | E – 6 | -22 | 76W | ||||
| 10 | C – 6 | 28 | 73W | ||||
| 11 | B – 8 | 30 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.