Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 September 1961
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)
- 17
- Relative number (R)
- 67
- Observer
- ET
- Reading
- all checks consistent
- File
- 19610919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 27 | 19'E | ||||
| 2 | J – 1 | 19 | 34E | ||||
| 3 | A – 5 | 3 | 5WE | ||||
| 4 | J – 2 | -10 | 65W | ||||
| 5 | G – 7 | 15 | 43W.E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.