Daily Sunspot Evaluation
Observation Sheet Monday, 20 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)
- 12
- Number of spots (f)
- 63
- Relative number (R)
- 183
- Observer
- BG
- Reading
- all checks consistent
- File
- 19590720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 7 | 28 | 16E | ||||
| 2 | J – 2 | 23 | 55E | ||||
| 3 | J – 1 | 19 | 59E | ||||
| 4 | G – 4 | 10 | 18E | ||||
| 5 | J – 1 | 10 | 39W | ||||
| 6 | F – 11 | 17 | 29W | ||||
| 7 | ? – 3 | 22 | 29W | ||||
| 8 | J – 3 | 21 | 41W | ||||
| 9 | A – 2 | 20 | 34W | ||||
| 10 | H – 16 | 11 | 5W | ||||
| 11 | G – 5 | 26 | 13W | ||||
| 12 | H – 8 | 32 | 8W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.