Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 14
- Number of spots (f)
- 89
- Relative number (R)
- 229
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19911013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 19 | 84W | 110 | 87W | 3 | 555 |
| 2 | AX – 2 | 6 | 02E | 24 | 01W | 1 | 574 |
| 3 | CAI – 19 | 7 | 17E | 9 | 14E | 12 | 565 |
| 4 | AX – 3 | 2 | 23E | 3 | 20E | 0.5 | 566 |
| 5 | BRO – 5 | 18 | 24E | 2 | 21E | 7.5 | 568 |
| 6 | HA – 1 | 6 | 29E | 357 | 26E | 1.5 | 569 |
| 7 | ? – 1 | 23 | 85E | 301 | 82E | - | 575 |
| 8 | AX – 1 | -17 | 56W | 82 | 59W | - | 567 |
| 9 | HA – 1 | -9 | 52W | 78 | 55W | 1 | 560 |
| 10 | AX – 1 | -18 | 50W | 76 | 53W | - | 576 |
| 11 | AX – 1 | -14 | 43W | 69 | 46W | - | 577 |
| 12 | DAI – 9 | -12 | 06E | 20 | 03E | 3.5 | 581 |
| 13 | DKC – 28 | -23 | 16E | 10 | 13E | 8 | 582 |
| 14 | DAI – 16 | -21 | 52E | 334 | 49E | 10 | 571 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.