Daily Sunspot Evaluation
Observation Sheet Monday, 21 February 1983
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)
- 4
- Number of spots (f)
- 7
- Relative number (R)
- 47
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 3 | 14 | 60E | 224 | 57E | 4 | 50 |
| 2 | AXX – 2 | -16 | 19W | 303 | 22W | 0.75 | 47 |
| 3 | HAX – 1 | -13 | 17E | 267 | 14E | 1 | 48 |
| 4 | HSX – 1 | -9 | 35E | 249 | 32E | 2 | 49 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.