Daily Sunspot Evaluation
Observation Sheet Saturday, 31 January 1998
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)
- 2
- Number of spots (f)
- 8
- Relative number (R)
- 28
- Observer
- NA
- Reading
- all checks consistent
- File
- 19980131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 5 | 15 | 220 | 265 | 210 | 1 | 16 |
| 2 | HS – 3 | -35 | 430 | 286 | 450 | 3.5 | 20 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.