Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 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)
- 9
- Number of spots (f)
- 45
- Relative number (R)
- 135
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 13 | 24 | 17W | 229 | 15W | 9.5 | 181 |
| 2 | BRO – 3 | 20 | 07E | 205 | 05E | 3.5 | 182 |
| 3 | AR – 2 | 22 | 11E | 201 | 09E | 1 | 185 |
| 4 | HA – 2 | 14 | 31E | 141 ⚠ | 69E | 2.5 | 179 |
| 5 | AR – 1 | -17 | 59W | 271 | 61W | 1 | 178 |
| 6 | BRI – 9 | -17 | 40W | 252 | 42W | 6 | 179 |
| 7 | AX – 3 | -15 | 39W | 251 | 41W | 2.5 | 187 |
| 8 | AR – 2 | -30 | 37W | 249 | 39W | 0.5 | 189 |
| 9 | CAO – 10 | -21 | 54E | 158 | 52E | 7.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.