Daily Sunspot Evaluation
Observation Sheet Monday, 17 April 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)
- 102
- Relative number (R)
- 182
- Observer
- HE
- Reading
- all checks consistent
- File
- 19890417.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 17 | 15 | 58W | 205 | 61W | 8 | 181 |
| 2 | HS – 3 | 14 | 07E | 140 | 04E | 2 | 185 |
| 3 | AX – 3 | 20 | 09E | 138 | 06E | 0.5 | 181 |
| 4 | EKI – 26 | 9 | 22E | 125 | 19E | 16 | 188 |
| 5 | HA – 3 | 18 | 65E | 82 | 62E | 2 | 182 |
| 6 | EKC – 38 | -22 | 12W | 159 | 15W | 14.5 | 186 |
| 7 | EAC – 10 | -18 | 68W | 215 | 71W | 13.5 | 190 |
| 8 | ? – 2 | -23 | 83W | 230 | 86W | 7 | 184 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.