Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 September 1988
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)
- 81
- Relative number (R)
- 201
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880920.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAC – 9 | 30 | 78W | 100 | 81W | 1.6 | 243 |
| 2 | BRE – 4 | 19 | 11W | 33 | 14W | 3 | 224 |
| 3 | BAI – 8 | 24 | 29E | 353 | 26E | 3.25 | 238 |
| 4 | BRE – 6 | 30 | 67E | 315 | 64E | 5 | 237 |
| 5 | BRO – 2 | 25 | 68E | 314 | 65E | 4 | 239 |
| 6 | ? – 4 | 23 | 82E | 300 | 79E | 4 | 240 |
| 7 | BRO – 5 | -19 | 44W | 66 | 47W | 5 | 234 |
| 8 | HH – 4 | -12 | 40W | 62 | 43W | 5 | 225 |
| 9 | CAO – 10 | -15 | 29E | 353 | 26E | 4.2 | 230 |
| 10 | HH – 8 | -36 | 37E | 345 | 34E | 4 | 252 |
| 11 | DAC – 16 | -36 | 43E | 315 ⚠ | 44E | 9 | 236 |
| 12 | AX – 5 | -39 | 65E | 317 | 62E | 5 | 241 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.