Daily Sunspot Evaluation
Observation Sheet Sunday, 21 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)
- 6
- Number of spots (f)
- 26
- Relative number (R)
- 86
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19930221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 15 | 44W | 352 | 46W | 1 | 41 |
| 2 | DRO – 6 | 8 | 05W | 313 | 07W | 6 | 48 |
| 3 | DAO – 3 | 12 | 70E | 238 | 68E | 9 | 47 |
| 4 | HR – 3 | -19 | 15W | 323 | 17W | 3 | 49 |
| 5 | DSO – 9 | -42 | 20E | 288 | 18E | 15 | 43 |
| 6 | DSO – 4 | -17 | 48E | 260 | 46E | 10 | 46 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.