Daily Sunspot Evaluation
Observation Sheet Thursday, 9 August 1990
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)
- 11
- Number of spots (f)
- 65
- Relative number (R)
- 175
- Observer
- TS
- Reading
- all checks consistent
- File
- 19900809.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 17 | 75W | 17 | 78W | 2 | 353 |
| 2 | DSO – 4 | 23 | 31W | 333 | 34W | 5.5 | 338 |
| 3 | HK – 7 | 17 | 30W | 332 | 33W | 6.5 | 340 |
| 4 | BRO – 2 | 23 | 15W | 317 | 18W | 5.5 | 344 |
| 5 | HK – 13 | 12 | 64E | 238 | 61E | 9 | 358 |
| 6 | ? – 3 | 10 | 77E | 225 | 74E | 9 | 359 |
| 7 | DKI – 12 | -17 | 48W | 350 | 51W | 10 | 343 |
| 8 | BRO – 3 | -22 | 38W | 340 | 41W | 7 | 353 |
| 9 | CAI – 15 | -14 | 47E | 255 | 44E | 9 | 356 |
| 10 | AX – 3 | -11 | 56E | 246 | 53E | 1 | 360 |
| 11 | ? – 1 | -38 | 70E | 232 | 67E | 1 | 361 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.