Daily Sunspot Evaluation
Observation Sheet Friday, 17 July 1959
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)
- 85
- Relative number (R)
- 185
- Observer
- BG
- Reading
- all checks consistent
- File
- 19590717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 8 | 21 | 4E | ||||
| 2 | H – 2 | 32 | 31E | ||||
| 3 | H – 11 | 26 | 25E | ||||
| 4 | A – 3 | 28 | 56E | ||||
| 5 | G – 2 | 10 | 5E | ||||
| 6 | H – 9 | 13 | 36E | ||||
| 7 | J – 1 | 9 | 57E | ||||
| 8 | H – 4 | -14 | 66W | ||||
| 9 | E – 13 | 5 | 15W | ||||
| 10 | E – 32 | 18 | 35W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.