Daily Sunspot Evaluation
Observation Sheet Thursday, 15 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)
- 40
- Relative number (R)
- 60
- Observer
- YK
- Reading
- all checks consistent
- File
- 19980115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 37 | -23 | 26W | 120 | 28W | 10 | |
| 2 | CSO – 3 | -17 | 53E | 41 | 51E | 5.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.