Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 4
- Number of spots (f)
- 33
- Relative number (R)
- 73
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19900309.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 10 | 28 | 20W | 184 | 23W | 5.5 | 102 |
| 2 | HK – 1 | 20 | 62E | 102 | 59E | 3.5 | 106 |
| 3 | CAO – 10 | -14 | 57W | 221 | 60W | 10.5 | 105 |
| 4 | DKI – 12 | -11 | 12W | 176 | 15W | 10 | 103 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.