Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 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)
- 3
- Number of spots (f)
- 43
- Relative number (R)
- 73
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19980113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | -20 | 16W | 136 | 18W | 4.5 | 6 x |
| 2 | DAC – 37 | -23 | 01W | 121 | 3W | 10 | 2 x |
| 3 | AX – 2 | -18 | 78E | 42 | 76E | 10 x |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.