Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 October 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)
- 13
- Number of spots (f)
- 73
- Relative number (R)
- 203
- Observer
- ET
- Reading
- all checks consistent
- File
- 19591020.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | 6 | 12E | ||||
| 2 | A – 4 | 9 | 21E | ||||
| 3 | ? – 2 | 7 | 76E | ||||
| 4 | H – 9 | 2 | 30E | ||||
| 5 | G – 26 | -1 | 17E | ||||
| 6 | A – 5 | -12 | 17E | ||||
| 7 | A – 1 | -6 | 9E | ||||
| 8 | B – 8 | -4 | 2E | ||||
| 9 | A – 1 | -14 | 67W | ||||
| 10 | A – 2 | -9 | 52W | ||||
| 11 | J – 3 | -7 | 59W | ||||
| 12 | H – 4 | 6 | 36W | ||||
| 13 | A – 3 | 16 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.