Daily Sunspot Evaluation
Observation Sheet Saturday, 18 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)
- 12
- Number of spots (f)
- 106
- Relative number (R)
- 226
- Observer
- HE
- Reading
- all checks consistent
- File
- 19890218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 33 | 80W | 272 | 83W | - | 73 |
| 2 | HA – 1 | 18 | 54W | 246 | 57W | 2.0 | 73 |
| 3 | CAI – 8 | 25 | 52W | 244 | 55W | 10.0 | 73 |
| 4 | CAO – 7 | 28 | 15W | 207 | 18W | 9.0 | 73 |
| 5 | EAO – 14 | 20 | 05W | 197 | 08W | 11.5 | 73 |
| 6 | AX – 1 | 26 | 01E | 191 | 02W | - | 73 |
| 7 | AX – 3 | 31 | 06E | 186 | 03E | 3.5 | 73 |
| 8 | AX – 1 | 12 | 07E | 185 | 04E | - | 73 |
| 9 | BXO – 5 | 16 | 59E | 133 | 56E | 9.0 | 73 |
| 10 | FKI – 28 | -17 | 51W | 243 | 54W | 19.5 | 73 |
| 11 | EKC – 28 | -12 | 27E | 165 | 24E | 13.5 | 73 |
| 12 | CAI – 8 | -21 | 46E | 146 | 43E | 10.0 | 73 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.