Daily Sunspot Evaluation
Observation Sheet Sunday, 7 October 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)
- 70
- Relative number (R)
- 180
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19901007.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 11 | 20 | 08W | 250 | 11W | 7 | 457 |
| 2 | BRO – 3 | 18 | 10E | 232 | 07E | 4 | 465 |
| 3 | HA – 7 | 12 | 12E | 230 | 09E | 5 | 459 |
| 4 | ? – 1 | 12 | 83E | 159 | 80E | 5 | 467 |
| 5 | DAI – 9 | -5 | 75W | 317 | 78W | 10 | 453 |
| 6 | AX – 1 | -18 | 43W | 285 | 46W | - | 454 |
| 7 | BRO – 9 | -15 | 11W | 253 | 14W | 5.5 | 462 |
| 8 | DKO – 12 | -16 | 34E | 208 | 31E | 10 | 463 |
| 9 | BXI – 6 | -9 | 50E | 192 | 47E | 7 | 468 |
| 10 | BXI – 9 | -24 | 55E | 187 | 52E | 7 | 464 |
| 11 | HA – 2 | -12 | 63E | 179 | 60E | 4 | 466 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.