Daily Sunspot Evaluation
Observation Sheet Sunday, 17 May 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)
- 105
- Relative number (R)
- 205
- Observer
- FY
- Reading
- all checks consistent
- File
- 19590517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | 11 | 9E | ||||
| 2 | A – 2 | 21 | 58E | ||||
| 3 | ? – 2 | 24 | 79E | ||||
| 4 | A – 1 | 18 | 50E | ||||
| 5 | ? – 1 | 20 | 73E | ||||
| 6 | C – 3 | -7 | 40E | ||||
| 7 | D – 10 | 8 | 34W | ||||
| 8 | J – 2 | 27 | 69W | ||||
| 9 | E – 65 | 17 | 34W | ||||
| 10 | H – 14 | 20 | 18W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.