Daily Sunspot Evaluation
Observation Sheet Saturday, 19 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)
- 11
- Number of spots (f)
- 99
- Relative number (R)
- 209
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 23 | 13 | 4E | 21 | |||
| 2 | B – 2 | 15 | 22E | ||||
| 3 | J – 2 | 25 | 61E | ||||
| 4 | B – 2 | 20 | 57E | ||||
| 5 | H – 9 | -9 | 67E | ||||
| 6 | B – 4 | -12 | 39E | ||||
| 7 | C – 14 | -21 | 29E | ||||
| 8 | A – 2 | -17 | 23E | ||||
| 9 | D – 21 | -11 | 10E | ||||
| 10 | E – 18 | -16 | 10W | ||||
| 11 | J – 2 | 5 | 37W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.