Daily Sunspot Evaluation
Observation Sheet Sunday, 9 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)
- 14
- Number of spots (f)
- 61
- Relative number (R)
- 201
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 28 | 74W | 327 | 77W | 11 | 175 |
| 2 | AX – 1 | 31 | 61W | 314 | 64W | - | 176 |
| 3 | CAO – 7 | 16 | 32W | 285 | 35W | 8.5 | 177 |
| 4 | AR – 1 | 37 | 15E | 238 | 12E | 0.5 | 178 |
| 5 | DKI – 9 | 34 | 22E | 231 | 19E | 7.5 | 179 |
| 6 | AR – 1 | 19 | 44E | 209 | 41E | 0.5 | 180 |
| 7 | AX – 1 | 17 | 45E | 208 | 42E | - | 181 |
| 8 | HA – 2 | 23 | 51E | 202 | 48E | 2 | 182 |
| 9 | FKO – 11 | -19 | 57W | 310 | 60W | 20 | 183 |
| 10 | AR – 1 | -11 | 45W | 298 | 48W | 0.5 | 184 |
| 11 | BXO – 7 | -34 | 21W | 274 | 24W | 7.5 | 185 |
| 12 | CAO – 4 | -18 | 17W | 230 ⚠ | 20W | 5.5 | 186 |
| 13 | CAI – 10 | -19 | 00 | 253 | 03W | 5 | 187 |
| 14 | HA – 3 | -15 | 01E | 252 | 02W | 1.5 | 188 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.