Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 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)
- 5
- Relative number (R)
- 25
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19980120.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 4 | -18 | 15W | 43 | 16W | 2 | 15 |
| 2 | HR – 1 | 24 | 42E | 346 | 41E | 13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.