Daily Sunspot Evaluation
Observation Sheet Friday, 5 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)
- 10
- Number of spots (f)
- 80
- Relative number (R)
- 180
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910405.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 25 | 14 | 30W | 58 | 31W | 7 | 138 |
| 2 | EAC – 21 | 10 | 02W | 30 | 03W | 11 | 139 |
| 3 | AX – 1 | 8 | 51E | 337 | 50E | - | 142 |
| 4 | HA – 1 | 5 | 60E | 328 | 59E | 1 | 143 |
| 5 | DKI – 17 | -11 | 27W | 55 | 28W | 9 | 141 |
| 6 | CAO – 8 | -12 | 32E | 356 | 31E | 5 | 144 |
| 7 | AX – 1 | -19 | 35E | 355 | 32E | - | 145 |
| 8 | AX – 4 | -22 | 40E | 348 | 39E | 2 | 146 |
| 9 | AX – 1 | -26 | 44E | 344 | 43E | - | 147 |
| 10 | AX – 1 | -7 | 58E | 330 | 57E | - | 148 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.