Daily Sunspot Evaluation
Observation Sheet Saturday, 11 April 1998
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)
- 7
- Number of spots (f)
- 39
- Relative number (R)
- 109
- Observer
- MB
- Reading
- all checks consistent
- File
- 19980411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 7 | -28 | 44W | 86 | 49W | 07 | 39 |
| 2 | ESO – 7 | -23 | 40W | 82 | 43W | 12 | 47 |
| 3 | DAO – 7 | -22 | 11W | 53 | 14W | 07 | 65 |
| 4 | EHO – 5 | -20 | 06E | 36 | 03E | 11 | 61 |
| 5 | BXO – 4 | -26 | 12E | 30 | 09E | 3.5 | 62 |
| 6 | BXE – 7 | -29 | 33E | 9 | 30E | 06 | 68 |
| 7 | AX – 2 | -22 | 37E | 7 | 32E | 01 | 68 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.