Daily Sunspot Evaluation
Observation Sheet Friday, 7 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)
- 15
- Number of spots (f)
- 106
- Relative number (R)
- 256
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 5 | 17 | 54W | 333 | 57W | 5.5 | 174 |
| 2 | BRI – 8 | 26 | 46W | 325 | 49W | 6 | 179 |
| 3 | AX – 1 | 8 | 41W | 320 | 44W | - | 175 |
| 4 | AX – 4 | 30 | 33W | 312 | 36W | 1 | 176 |
| 5 | DAO – 11 | 17 | 05W | 284 | 08W | 7.5 | 171 |
| 6 | AX – 1 | 28 | 17E | 262 | 14E | - | 169 |
| 7 | HK – 7 | 35 | 50E | 229 | 47E | 4.5 | 172 |
| 8 | AX – 1 | 20 | 72E | 207 | 69E | - | 173 |
| 9 | ? – 1 | 23 | 80E | 199 | 77E | - | 175 |
| 10 | EKI – 34 | -19 | 29W | 368 ⚠ | 32W | 20.5 | 166 |
| 11 | CAO – 7 | -12 | 14W | 294 | 17W | 7 | 168 |
| 12 | AX – 2 | -24 | 06E | 273 | 03E | 0.5 | 165 |
| 13 | DAI – 12 | -17 | 10E | 269 | 07E | 5.5 | 177 |
| 14 | BXI – 7 | -20 | 28E | 251 | 25E | 3.5 | 178 |
| 15 | HS – 5 | -16 | 29E | 250 | 26E | 4 | 169 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.