Daily Sunspot Evaluation
Observation Sheet Wednesday, 16 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)
- 9
- Number of spots (f)
- 79
- Relative number (R)
- 169
- Observer
- YK
- Reading
- all checks consistent
- File
- 19911016.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 7 | 31W | 16 | 33W | 2 | 565 |
| 2 | BXO – 4 | 16 | 18W | 3 | 20W | 6.5 | 568 |
| 3 | AX – 1 | 1 | 18W | 3 | 20W | - | 566 |
| 4 | AX – 1 | 18 | 08W | 353 | 10W | - | 560 |
| 5 | BRI – 24 | 22 | 48E | 297 | 46E | 15 | 575 |
| 6 | AX – 1 | -38 | 31W | 16 | 33W | - | 548 |
| 7 | DKI – 26 | -23 | 23W | 8 | 25W | 6.5 | 562 |
| 8 | CAO – 5 | -3 | 05E | 340 | 03E | 5 | 583 |
| 9 | EAO – 16 | -21 | 12E | 333 | 10E | 12 | 571 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.