Daily Sunspot Evaluation
Observation Sheet Sunday, 19 February 1989
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)
- 146
- Relative number (R)
- 246
- Observer
- MB
- Reading
- all checks consistent
- File
- 19890219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 3 | 19 | 67W | 245 | 70W | 2.5 | 77 |
| 2 | CSO – 5 | 23 | 65W | 243 | 68W | 9.5 | 57 |
| 3 | CAO – 3 | 27 | 30W | 208 | 33W | 5.5 | 82 |
| 4 | CSO – 16 | 20 | 20W | 198 | 23W | 15.0 | 95 |
| 5 | AX – 1 | 17 | 10W | 188 | 13W | - | 72 |
| 6 | CAO – 22 | 18 | 44E | 134 | 41E | 12.0 | 72 |
| 7 | CAI – 34 | -19 | 63W | 241 | 66W | 20.0 | 51 |
| 8 | FKI – 45 | -12 | 13E | 165 | 10E | 16.0 | 72 |
| 9 | CSI – 13 | -20 | 34E | 144 | 31E | 12.0 | |
| 10 | ? – 4 | -8 | 80E | 98 | 77E | 4.0 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.