Daily Sunspot Evaluation
Observation Sheet Friday, 13 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)
- 3
- Number of spots (f)
- 22
- Relative number (R)
- 52
- Observer
- MB
- Reading
- all checks consistent
- File
- 19980213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | -24 | 48W | 118 | 49W | 0.5 | 22 23 |
| 2 | EAI – 19 | -25 | 35E | 35 | 36E | 11 | 26 27 |
| 3 | AX – 2 | -20 | 55E | 15 | 56E | - | 28 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.