Daily Sunspot Evaluation
Observation Sheet Saturday, 21 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)
- 2
- Number of spots (f)
- 8
- Relative number (R)
- 28
- Observer
- TA
- Reading
- all checks consistent
- File
- 19980221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CKO – 5 | -26 | 65W | 33 | 68W | 12.5 | 26 24 |
| 2 | BXO – 3 | -33 | 54E | 274 | 51E | 4.5 | 34 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.