Daily Sunspot Evaluation
Observation Sheet Thursday, 23 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)
- 6
- Number of spots (f)
- 105
- Relative number (R)
- 165
- Observer
- YK
- Reading
- all checks consistent
- File
- 19890223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 37 | 16 | 12W | 138 | 14W | 14.75 | 436 |
| 2 | BXI – 3 | 11 | 75E | 51 | 73E | 4.25 | 401 |
| 3 | EKC – 44 | -12 | 43W | 169 | 45W | 13.50 | 495 |
| 4 | BRI – 9 | -22 | 19W | 145 | 21W | 9.75 | 90 |
| 5 | AX – 1 | -13 | 14E | 112 | 12E | - | 100 |
| 6 | DSI – 11 | -9 | 26E | 100 | 24E | 8.25 | 68 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.