Daily Sunspot Evaluation
Observation Sheet Friday, 17 January 1992
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)
- 6
- Number of spots (f)
- 23
- Relative number (R)
- 83
- Observer
- YK
- Reading
- all checks consistent
- File
- 19920117.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 2 | 25 | 29W | 229 | 29W | 6 | 29 |
| 2 | CAO – 4 | 13 | 18E | 180 | 18E | 5.5 | 21 |
| 3 | DAO – 2 | -6 | 50W | 248 | 50W | 6 | 16 |
| 4 | DSI – 6 | -10 | 05E | 193 | 05E | 7.5 | 22 |
| 5 | AX – 1 | -27 | 50E | 148 | 50E | - | 28 |
| 6 | BXI – 8 | -11 | 53E | 145 | 53E | 6 | 27 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.