Daily Sunspot Evaluation
Observation Sheet Thursday, 11 May 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)
- 12
- Number of spots (f)
- 140
- Relative number (R)
- 260
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 29 | 71W | 261 | 74W | 2 | |
| 2 | BXI – 20 | 17 | 19W | 209 | 22W | 7 | |
| 3 | BRO – 26 | 10 | 18W | 208 | 21W | 7.25 | |
| 4 | HA – 5 | 27 | 18E | 172 | 15E | 2 | |
| 5 | HK – 8 | 9 | 52E | 138 | 49E | 7 | |
| 6 | ? – 1 | 16 | 82E | 102 ⚠ | 85E | - | |
| 7 | AX – 2 | -23 | 47W | 237 | 50W | 2 | |
| 8 | CAI – 62 | -30 | 06W | 196 | 09W | 16 | |
| 9 | AX – 1 | -37 | 02W | 192 | 05W | - | |
| 10 | CSI – 10 | -19 | 34E | 156 | 31E | 6 | |
| 11 | AX – 2 | -25 | 35E | 155 | 32E | 3 | |
| 12 | AR – 1 | -10 | 71E | 119 | 68E | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.