Daily Sunspot Evaluation
Observation Sheet Saturday, 8 September 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)
- 19
- Relative number (R)
- 129
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19900908.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 17 | 64W | 329 | 67W | 2° | 401 |
| 2 | HS – 1 | 14 | 54W | 319 | 57W | 1.5 | 405 |
| 3 | AX – 1 | 21 | 19W | 284 | 22W | - | 417 |
| 4 | HA – 5 | 4 | 01E | 264 | 02W | 5 | 409 |
| 5 | AX – 1 | 15 | 14E | 251 | 11E | - | 413 |
| 6 | HA – 1 | 12 | 30E | 235 | 27E | 2.5 | 412 |
| 7 | HS – 1 | 7 | 52E | 213 | 49E | 2 | 414 |
| 8 | HA – 1 | 18 | 63E | 202 | 60E | 1.5 | 416 |
| 9 | ? – 1 | -12 | 78W | 343 | 81W | 2.5 | 402 |
| 10 | CAI – 5 | -13 | 52W | 317 | 55W | 8.5 | 408 |
| 11 | AR – 1 | -13 | 23W | 288 | 26W | 0.5 | 410 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.