Daily Sunspot Evaluation
Observation Sheet Thursday, 17 September 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)
- 5
- Number of spots (f)
- 38
- Relative number (R)
- 88
- Observer
- BG
- Reading
- all checks consistent
- File
- 19590917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | 15 | 32E | ||||
| 2 | C – 9 | -16 | 19E | ||||
| 3 | ? – 2 | -17 | 78E | ||||
| 4 | C – 10 | 7 | 9W | ||||
| 5 | ? – 6 | 7 | 80W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.