Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 17
- Relative number (R)
- 37
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19980116.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | 15 | 16W | 96 | 17W | 4 | 11 20 |
| 2 | DAC – 13 | -23 | 41W | 121 | 42W | 10 | 2 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.