Daily Sunspot Evaluation
Observation Sheet Thursday, 12 February 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)
- 5
- Number of spots (f)
- 19
- Relative number (R)
- 69
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19980212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 26 | 60E | 26 | 59E | 27 28 | |
| 2 | HS – 1 | -24 | 31W | 117 | 34W | 1 | 22 25 |
| 3 | AX – 2 | -40 | 03W | 89 | 06W | 05 | 23 24 |
| 4 | DAC – 14 | -25 | 52E | 34 | 49E | 10 | 26 27 |
| 5 | AX – 1 | -20 | 69E | 17 | 66E | 23 25 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.