Daily Sunspot Evaluation
Observation Sheet Friday, 26 April 1991
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)
- 18
- Relative number (R)
- 78
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910426.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 1 | 7 | 07W | 120 | 10W | 0.5 | 192 |
| 2 | ? – 1 | 8 | 73E | 40 | 70E | 2 | 193 |
| 3 | ? – 1 | -11 | 77W | 190 | 80W | 1.5 | 194 |
| 4 | BXI – 13 | -30 | 27W | 140 | 30W | 7 | 191 |
| 5 | AX – 1 | -11 | 08W | 121 | 11W | - | 194 |
| 6 | AR – 1 | -22 | 51E | 62 | 48E | 0.5 | 195 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.