Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 129
- Relative number (R)
- 259
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 16 | 86W | 335 | 89W | - | 340 |
| 2 | DAO – 3 | 23 | 84W | 333 | 87W | 6 | 338 |
| 3 | CAI – 22 | 13 | 10E | 239 | 07E | 8.5 | 358 |
| 4 | EAI – 36 | 12 | 22E | 227 | 19E | 13 | 359 |
| 5 | EAC – 24 | 17 | 42E | 207 | 39E | 14 | 362 |
| 6 | BRI – 13 | 2 | 37E | 212 | 34E | 7 | 365 |
| 7 | CAI – 4 | 21 | 73E | 176 | 70E | 14 | 368 |
| 8 | AX – 1 | -6 | 75W | 324 | 78W | - | 366 |
| 9 | AX – 2 | -18 | 25W | 274 | 28W | - | 363 |
| 10 | HA – 6 | -13 | 08W | 257 | 11W | 2 | 354 |
| 11 | BRI – 9 | -10 | 04E | 245 | 01E | 4 | 360 |
| 12 | AX – 2 | -3 | 43E | 206 | 40E | 1 | 363 |
| 13 | BRO – 4 | -16 | 53E | 196 | 50E | 6.5 | 367 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.