Daily Sunspot Evaluation
Observation Sheet Saturday, 8 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)
- 123
- Relative number (R)
- 273
- Observer
- YK
- Reading
- all checks consistent
- File
- 19890408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAE – 9 | 15 | 60W | 325 | 62W | 5 | 172 |
| 2 | DAI – 9 | 25 | 52W | 317 | 54W | 6 | 175 |
| 3 | BXE – 3 | 29 | 39W | 304 | 41W | 5.5 | 175 |
| 4 | DAI – 16 | 15 | 15W | 280 | 17W | 7.5 | 175 |
| 5 | AX – 1 | 27 | 09E | 256 | 07E | - | 175 |
| 6 | AR – 6 | 26 | 30E | 235 | 28E | 3.5 | 175 |
| 7 | HK – 11 | 33 | 41E | 224 | 39E | 6.5 | 175 |
| 8 | AR – 1 | 19 | 64E | 201 | 62E | 1 | 175 |
| 9 | AR – 1 | 22 | 72E | 193 | 70E | 1.5 | 175 |
| 10 | FKI – 24 | -21 | 38W | 303 | 40W | 19 | 175 |
| 11 | BRI – 8 | -13 | 26W | 291 | 28W | 6 | 175 |
| 12 | BXI – 7 | -26 | 05W | 270 | 07W | 5.5 | 175 |
| 13 | CAE – 11 | -19 | 02W | 267 | 04W | 6 | 175 |
| 14 | DAI – 9 | -21 | 17E | 248 | 15E | 4.5 | 175 |
| 15 | HS – 7 | -17 | 18E | 247 | 16E | 3.5 | 175 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.