Daily Sunspot Evaluation
Observation Sheet Friday, 15 November 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)
- 4
- Number of spots (f)
- 30
- Relative number (R)
- 70
- Observer
- YK
- Reading
- all checks consistent
- File
- 19911115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 3 | 17 | 65W | 15 | 67W | 6° | 611 |
| 2 | AX – 2 | 20 | 55W | 5 | 57W | 1° | 621 |
| 3 | FAI – 9 | 10 | 34W | 344 | 36W | 12.5 | 622 |
| 4 | DAC – 16 | -11 | 09W | 319 | 11W | 10° | 630 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.