Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 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)
- 8
- Number of spots (f)
- 144
- Relative number (R)
- 224
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19890221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 3 | 27 | 56W | 208 | 59W | 1.5 | 88 |
| 2 | BXO – 3 | 21 | 44W | 196 | 47W | 9.5 | 82 |
| 3 | AR – 6 | 30 | 32W | 184 | 35W | 3.0 | 83 |
| 4 | EKC – 38 | 16 | 16E | 136 | 13E | 14.5 | 96 |
| 5 | FKC – 57 | -12 | 14W | 166 | 17W | 17.0 | 91 |
| 6 | CSI – 25 | -21 | 07E | 145 | 04E | 11.0 | 92 |
| 7 | DAI – 11 | -10 | 54E | 98 | 51E | 7.0 | 98 |
| 8 | AX – 1 | -26 | 70E | 82 | 67E | - | 100 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.