Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 11
- Number of spots (f)
- 30
- Relative number (R)
- 140
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19890411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 16 | 65W | 290 | 67W | - | 171 |
| 2 | DAO – 10 | 34 | 05W | 230 | 07W | 9 | 172 |
| 3 | BRO – 3 | 20 | 19E | 206 | 17E | 3.5 | 181 |
| 4 | AR – 2 | 22 | 23E | 202 | 21E | 1 | 182 |
| 5 | ? – 1 | 15 | 85E | 140 | 83E | - | 183 |
| 6 | AX – 1 | -10 | 73W | 298 | 75W | - | 184 |
| 7 | AX – 2 | -24 | 53W | 278 | 55W | 0.5 | 185 |
| 8 | HA – 2 | -18 | 47W | 272 | 49W | 1.5 | 186 |
| 9 | AX – 5 | -17 | 30W | 255 | 32W | 1.5 | 187 |
| 10 | AX – 2 | -15 | 27W | 252 | 29W | 0.5 | 188 |
| 11 | AX – 1 | -21 | 67E | 158 | 65E | - | 189 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.