Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 December 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)
- 2
- Number of spots (f)
- 19
- Relative number (R)
- 39
- Observer
- HG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19831221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 20 | 76W | 257 ⚠ | 77W | 1 | 340 |
| 2 | DAC – 18 | -11 | 25W | 266 ⚠ | 26W | 12 | 339 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.