Daily Sunspot Evaluation
Observation Sheet Sunday, 20 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)
- 3
- Number of spots (f)
- 7
- Relative number (R)
- 37
- Observer
- HM
- Reading
- all checks consistent
- File
- 19830220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 5 | -16 | 06W | 303 | 08W | 47 | |
| 2 | HAX – 1 | -13 | 31E | 266 | 29E | 48 | |
| 3 | HAX – 1 | -10 | 49E | 248 | 49E | 49 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.