Daily Sunspot Evaluation
Observation Sheet Thursday, 22 February 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)
- 12
- Number of spots (f)
- 128
- Relative number (R)
- 248
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19900222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKI – 26 | 3 | 10W | 41 ⚠ | 13W | 9 | 83 |
| 2 | AX – 2 | 19 | 02E | 3 ⚠ | 01W | 2 | 82 |
| 3 | DAO – 24 | 15 | 51E | 340 ⚠ | 48E | 10 | 85 |
| 4 | AX – 1 | 21 | 61E | 300 | 58E | - | 90 |
| 5 | AX – 3 | -17 | 38W | 39 | 41W | 2.5 | 91 |
| 6 | AX – 1 | -20 | 23W | 24 | 26W | - | 92 |
| 7 | BRI – 5 | -3 | 04E | 357 | 01E | 6. | 88 |
| 8 | HS – 2 | -10 | 16E | 349 ⚠ | 43E | 2 | 77 |
| 9 | FAC – 33 | -37 | 26E | 335 | 23E | 16 | 81 |
| 10 | HA – 1 | -13 | 33E | 328 | 30E | 2.5 | 82 |
| 11 | EKC – 24 | -17 | 46E | 315 | 43E | 10.5 | 84 |
| 12 | BXI – 6 | -9 | 70E | 291 | 67E | 6.5 | 93 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.