Daily Sunspot Evaluation
Observation Sheet Saturday, 11 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)
- 14
- Number of spots (f)
- 80
- Relative number (R)
- 220
- Observer
- MB
- Reading
- all checks consistent
- File
- 19900811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 6 | 18 | 59W | 333 | 60W | 5 | 340 |
| 2 | DAO – 4 | 24 | 59W | 333 | 60W | 6 | 338 |
| 3 | AX – 2 | 23 | 47W | 321 | 48W | 2 | 344 |
| 4 | DAC – 23 | 13 | 34E | 240 | 33E | 10.5 | 358 |
| 5 | EAI – 14 | 11 | 48E | 226 | 47E | 10.5 | 359 |
| 6 | AR – 1 | 2 | 62E | 212 | 61E | 1 | 365 |
| 7 | EKC – 7 | 17 | 66E | 208 | 65E | 11 | 362 |
| 8 | DAO – 3 | -17 | 76W | 350 | 77W | 10 | 349 |
| 9 | AR – 1 | -22 | 71W | 345 | 72W | 1 | 353 |
| 10 | BRI – 5 | -5 | 51W | 325 | 52W | 3.5 | 366 |
| 11 | AR – 1 | -18 | 00 | 274 | 01W | 1 | 363 |
| 12 | HA – 5 | -12 | 17E | 257 | 16E | 2.5 | 350 |
| 13 | BRO – 6 | -35 | 22E | 252 | 21E | 5.5 | 364 |
| 14 | ? – 2 | -15 | 77E | 197 | 76E | 6 | 367 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.