Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 April 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)
- 6
- Number of spots (f)
- 26
- Relative number (R)
- 86
- Observer
- SG
- Reading
- all checks consistent
- File
- 19610419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 9 | 39E | ||||
| 2 | A – 2 | -9 | 53E | ||||
| 3 | B – 4 | -11 | 40E | ||||
| 4 | H – 4 | 3 | 25W | ||||
| 5 | C – 10 | 15 | 37W | ||||
| 6 | B – 5 | 10 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.