Daily Sunspot Evaluation
Observation Sheet Friday, 20 November 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)
- 6
- Number of spots (f)
- 41
- Relative number (R)
- 101
- Observer
- GT
- Reading
- all checks consistent
- File
- 19811120.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 19 | 75W | 280 | 77W | 2.25 | |
| 2 | HKX – 11 | 13 | 03E | 202 | 01E | 3 | |
| 3 | DKC – 14 | -17 | 55W | 260 | 57W | 11 | |
| 4 | ARX – 4 | -3 | 44W | 249 | 46W | 25 | |
| 5 | CAO – 9 | -4 | 22W | 227 | 24W | 6 | |
| 6 | AXX – 2 | -7 | 19W | 224 | 21W | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.