Daily Sunspot Evaluation
Observation Sheet Sunday, 11 March 1990
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)
- 36
- Relative number (R)
- 106
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900311.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 6 | 30 | 47W | 185 | 50W | 6 | 102 |
| 2 | HA – 1 | 19 | 36E | 102 | 33E | 2.5 | 106 |
| 3 | AX – 2 | 26 | 37E | 101 | 34E | 3.5 | 107 |
| 4 | DAO – 5 | 32 | 62E | 76 | 59E | 8 | 108 |
| 5 | CKO – 17 | -11 | 41W | 179 | 44W | 10 | 103 |
| 6 | AX – 3 | -24 | 25E | 113 | 22E | 2.5 | 109 |
| 7 | BXO – 2 | -9 | 33E | 105 | 30E | 4.5 | 110 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.