Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 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)
- 5
- Number of spots (f)
- 29
- Relative number (R)
- 79
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19831213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 11 | 70W | 57 | 72W | ? | 333 |
| 2 | CAI – 6 | 2 | 14E | 333 | 12E | 8 | 334 |
| 3 | CRI – 17 | -17 | 26W | 13 | 28W | 8.5 | 332 |
| 4 | HAX – 2 | -14 | 57E | 290 | 55E | 2 | 337 |
| 5 | AXX – 1 | -17 | 65E | 282 | 63E | 338 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.