Daily Sunspot Evaluation
Observation Sheet Thursday, 27 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)
- 7
- Number of spots (f)
- 127
- Relative number (R)
- 197
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 5 | 34 | 22W | 34 | 25W | 3.5 | 15 |
| 2 | BXI – 9 | 12 | 43E | 332 | 40E | 8.25 | 138 |
| 3 | AX – 1 | 28 | 58E | 339 ⚠ | 55E | - | 203 |
| 4 | EKS – 44 | -21 | 48W | 63 | 51W | 13.5 | 159 |
| 5 | AX – 1 | -14 | 46W | 61 | 49W | - | 193 |
| 6 | EAC – 39 | -19 | 18W | 33 | 21W | 12.5 | 153 |
| 7 | EKS – 28 | -19 | 60E | 315 | 57E | 15 | 100 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.