Daily Sunspot Evaluation
Observation Sheet Thursday, 8 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)
- 5
- Number of spots (f)
- 51
- Relative number (R)
- 101
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900308.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 3 | 30 | 56W | 232 | 59W | 10 | 100 |
| 2 | CKO – 13 | 29 | 04W | 181 | 07W | 12 | 102 |
| 3 | ? – 1 | 20 | 76E | 101 | 73E | 3 | 106 |
| 4 | DAI – 15 | -14 | 44W | 221 | 47W | 10 | 105 |
| 5 | DKI – 19 | -11 | 01E | 176 | 02W | 9.5 | 103 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.