Daily Sunspot Evaluation
Observation Sheet Wednesday, 16 December 1981
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)
- 5
- Number of spots (f)
- 20
- Relative number (R)
- 70
- Observer
- HM
- Reading
- all checks consistent
- File
- 19811216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 19 | 59W | 282 | 61W | 15 | |
| 2 | HAX – 3 | 11 | 19E | 204 | 17E | 1 | |
| 3 | DKI – 8 | -7 | 67W | 290 | 69W | 13 | |
| 4 | DKC – 5 | -14 | 52W | 275 | 54W | 6 | |
| 5 | HAX – 3 | -6 | 37W | 260 | 39W | 25 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.