Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 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)
- 10
- Number of spots (f)
- 59
- Relative number (R)
- 159
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | T – 1 | 39 | 20E | ||||
| 2 | B – 2 | 19 | 63E | ||||
| 3 | ? – 6 | 19 | 78E | ||||
| 4 | E – 14 | 8 | 41E | ||||
| 5 | C – 10 | -4 | 50E | ||||
| 6 | C – 8 | -22 | 45E | ||||
| 7 | C – 11 | -25 | 6E | ||||
| 8 | H – 5 | -22 | 28W | ||||
| 9 | A – 1 | -14 | 23W | ||||
| 10 | H – 1 | 16 | 2W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.