Daily Sunspot Evaluation
Observation Sheet Sunday, 12 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)
- 13
- Number of spots (f)
- 55
- Relative number (R)
- 185
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 2 | 16 | 74W | 334 | 75W | 3.5 | 340 |
| 2 | DAO – 2 | 23 | 73W | 333 | 74W | 5.5 | 338 |
| 3 | CAI – 15 | 13 | 21E | 239 | 20E | 7.5 | 358 |
| 4 | EAC – 14 | 12 | 34E | 226 | 33E | 11.5 | 359 |
| 5 | BRO – 2 | 3 | 49E | 211 | 48E | 5.5 | 365 |
| 6 | EAC – 7 | 18 | 53E | 207 | 52E | 10 | 362 |
| 7 | ? – 2 | 22 | 78E | 182 | 77E | 3 | 368 |
| 8 | BRO – 2 | -6 | 64W | 324 | 65W | 3 | 366 |
| 9 | AR – 1 | -18 | 14W | 274 | 15W | 0.5 | 363 |
| 10 | HA – 1 | -13 | 03E | 257 | 02E | 2.5 | 350 |
| 11 | AX – 1 | -10 | 16E | 244 | 15E | - | 360 |
| 12 | BXO – 2 | -2 | 56E | 204 | 55E | 3 | 369 |
| 13 | CAO – 4 | -16 | 63E | 197 | 62E | 8.5 | 367 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.