Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 October 1991
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)
- 67
- Relative number (R)
- 177
- Observer
- TK
- Reading
- all checks consistent
- File
- 19911009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 4 | 19 | 76W | 154 | 79W | 15 | 545 |
| 2 | AX – 1 | 23 | 72W | 150 | 75W | - | 563 |
| 3 | DSI – 8 | 8 | 50W | 128 | 53W | 8 | 553 |
| 4 | EAO – 15 | 19 | 21W | 99 | 24W | 11 | 555 |
| 5 | CAI – 10 | 12 | 16E | 62 | 13E | 6.5 | 564 |
| 6 | DAI – 3 | 6 | 72E | 6 | 69E | 8.5 | 565 |
| 7 | CAI – 3 | 0 | 75E | 3 | 72E | 6.5 | 566 |
| 8 | CAI – 5 | -18 | 05E | 75 | 02E | 3.5 | 567 |
| 9 | CAI – 12 | -10 | 08E | 70 | 05E | 4.5 | 568 |
| 10 | AX – 3 | -10 | 59E | 19 | 56E | 1 | 561 |
| 11 | ? – 3 | -24 | 71E | 7 | 68E | 7.5 | 562 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.