Daily Sunspot Evaluation
Observation Sheet Saturday, 20 February 1993
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)
- 7
- Relative number (R)
- 37
- Observer
- TK
- Reading
- all checks consistent
- File
- 19930220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 15 | 32W | 353 | 34W | 15 | 41 |
| 2 | DSO – 2 | -12 | 29E | 292 | 27E | 9 | 43 |
| 3 | DAO – 4 | -17 | 58E | 263 | 56E | 8 | 46 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.